As soon as we turn on the computer, it immediately starts running a miniature operating system, which we know as BIOS. It deals with testing devices, memory, loading operating systems, and distributing hardware resources. Many of the features of this set of programs (usually about 256-512 KB in size) allow you to support older operating systems like MS-DOS, giving them many features. Since the days of the PC/AT-8086, the BIOS has changed very little, and by the time the first Pentiums were launched, its development had almost stopped. Actually, there was nothing to change in it, except for dual BIOS, support network tools and flashing capabilities. But there were a lot of disadvantages: initial entry into the real processor mode, 16-bit addressing and 1 MB of available memory, the inability to have a “repair” console. And, of course, the eternal problem of support hard drives. Even now, drives up to 2.2 TB are guaranteed to be supported, no more.
Back in 2005, Intel decided to change the BIOS to EFI/UEFI (Unified Extensible Firmware Interface). The EFI system is a more advanced base operating system. UEFI has been working on some Unix and Windows platforms for a long time, but a mass transition has not yet occurred, despite good intentions. And they are like this:
- Availability of the notorious console for repairs system parameters and OS installations;
- The EFI partition makes it possible to perform some actions without loading the OS (watching movies, playing music);
- Internet access and therefore availability installed drivers network, TCP/IP stack, etc.);
- Presence graphics mode and user scripts;
- Support for gigantic disks;
- UEFI storage on new format partitions (GPT);
- Full support for all equipment from the moment of launch.
UEFI can use a general-purpose execution engine like the JVM to run hardware-independent code, which opens up enormous possibilities for creating bootable software.
There is also criticism of this technology. In particular, its implementation may lead to cutting off new players from the operating system market: for this purpose there will always be some technological loophole in the code. Like, for example, the inability to boot Windows 98 from modern BIOSes. But what’s worse is that you’ll have to forget about the millions of MS-DOS programs and other systems that relied on BIOS functions to operate. Perhaps they will still be emulated, but there are doubts about this. And among them there are probably important programs, which there will be no one to rewrite. However, all these issues can be resolved – at least through virtual operating systems. But what is certain is that new types of viruses will appear, and we will be able to see this quite soon.
Many of the modern brands producing PC hardware components, as well as software, strive to ensure that their products support the UEFI interface. Given software solution It is intended to become an alternative to the input/output system—BIOS—that is familiar to many computer enthusiasts. What are the specifics of the software in question? What nuances are typical for using its capabilities?
What is UEFI
Let's look at some basic information about UEFI. What kind of development is this? UEFI is a special interface that is installed between the OS installed on the computer and the software responsible for the low-level functions of the PC hardware components.
Sometimes referred to as UEFI BIOS. On the one hand, there is some error in this name, since BIOS is a software solution that operates on different principles. UEFI developed by Intel, BIOS is software that comes in several versions supported by different brands.
On the other hand, the purpose of BIOS and UEFI is almost the same. BIOS UEFI is a formal, not entirely correct phrase, but it does not contradict the logic of software and hardware algorithms for PC control.
Differences between BIOS and UEFI
But the first thing we will pay attention to is finding the differences between a “clean” BIOS and a “classic” UEFI. The fact is that the software solution we are considering is positioned as a more advanced alternative to BIOS. Many manufacturers of modern computer motherboards are trying to provide support for the appropriate type of software from Intel. Thus, we can trace the differences between UEFI and BIOS by studying, first of all, the shortcomings of the second system.
The first disadvantage of BIOS is that this system cannot ensure full utilization of disk space on very large “hard drives” - those that exceed 2 terabytes in volume. Indeed, just a few years ago, such values characterizing the capacity of hard drives seemed fantastic, and therefore PC manufacturers did not particularly focus on the corresponding drawback of the BIOS. But today you won’t surprise anyone with a hard drive with a capacity of more than 2TB. PC manufacturers began to feel that it was time to switch to UEFI, that this was an objective necessity based on modern technological trends.
Another one BIOS feature- is that it supports a limited number of primary partitions on the hard drive. In turn, UEFI works with 128. The structure of the new software solution from Intel implements a new partition table - GPT, which, in fact, allows you to use the noted technological advantage of UEFI.
With all the noted differences in the new software environment, developed by Intel, and the traditional BIOS I/O system, the main functions of the corresponding solutions are generally the same. Apart from the fundamentally new security algorithm in UEFI, there are not too many actual differences between the systems. Some experts believe that the new software platform allows operating systems to boot faster, others note that this is only relevant for Windows 8. Let's take a closer look at the security system implemented in UEFI.
New security technology
Where the new UEFI BIOS system is ahead is in the level of security. The fact is that there are viruses that can penetrate the microcircuit where the BIOS algorithms are written. After which, it becomes possible to load the OS with extended user rights, which opens up the widest possible opportunities for a hacker. In turn, the new solution from Intel implements secure boot - UEFI provides an appropriate algorithm called Secure Boot.
It is based on the use of special keys, which must be certified by the largest brands in the IT market. However, as experts note, in practice there are not too many such companies yet. In particular, with regard to the support of the corresponding option by operating system manufacturers, it is fully provided only by Microsoft and only in Windows 8. There is also information that compatibility with the new security system is implemented in some Linux distributions.
Benefits of UEFI
It is obvious that the noted disadvantages of the BIOS are, at the same time, the advantages of the new software solution. However, UEFI is characterized by a number of other important advantages. Let's look at them.
First of all, it is convenient, intuitive and functional interface. As a rule, it implements mouse support - which is not typical for BIOS. Also many versions of UEFI ( BIOS given option is also not typical) provide a Russified interface.
The algorithms provided by the new software solution allow loading operating systems in most cases significantly faster than when using BIOS. For example, Windows 8 installed on a UEFI-enabled computer can boot—provided the processor and other key hardware components have adequate performance—in literally 10 seconds.
Among other significant advantages of the software solution in question, which many IT specialists highlight, is a simpler update algorithm compared to BIOS mechanisms. Another useful UEFI option is that a given system has its own, which can be used if several operating systems are installed on the PC.
So, the technological advantages of the new software interface The controls of the PC, which is developed by Intel, are clear to us. The largest brands of PC hardware components ensure compatibility of the corresponding hardware with UEFI - Gigabyte, ASUS, SONY. The transition to a new system, as many IT experts believe, can turn into a sustainable technology trend. The opportunities offered to the global IT community by Intel, which developed UEFI, may well be attractive to leading manufacturers of software and hardware components for PCs. Moreover, the corresponding UEFI technological options are supported by the largest brand in the operating system market.
Facts about Secure Boot
Let's take a closer look at the advantages of Secure Boot technology supported by UEFI. What is this concept? secure boot a computer that is designed to protect the system, as we noted above, from the penetration of viruses. However, for its full use, the keys used by this protocol must be certified. On this moment Very few software brands meet this criterion. Among them - Microsoft company, which implemented support for the corresponding algorithms in Windows 8.
It may be noted that this circumstance in some cases can complicate the installation of other operating systems on a PC running UEFI. If you have to install Windows, UEFI may still show some loyalty to this - but provided that the OS version is as close as possible to the one installed by the computer manufacturer. It may also be noted that some Linux distributions are also compatible with the Secure Boot option.
But even if, due to the function in question, loading a new OS is prohibited by the system, the structure of the UEFI interface provides the ability to disable Secure Boot algorithms. It is clear that in this case, loading the OS will not be so safe, however, the corresponding option can be reactivated at any time and start working with Windows 8.
Which OS are fully UEFI compatible?
In very rare cases, individual IT specialists manage to install alternative operating systems on a PC with Secure Boot support. For example, it is known that it is theoretically possible to install Windows 7 on some laptops that support UEFI BIOS. ASUS is among the manufacturers of such PCs. But this is rather an exception to the rule. In general, the probability of successful installation of even other Windows editions 8. However, as we noted above, some Linux distributions are also compatible with UEFI options.
Features of UEFI setup
Let's look at some of the nuances of setting up the software solution in question from Intel. An interesting option is BIOS emulation using UEFI. What is this opportunity? Indeed, some versions of UEFI implement algorithms by which PC management is organized in accordance with the mechanisms used by the input/output system, which is the historical predecessor of UEFI.
Depending on the specific PC, this mode may be called differently. Most often this is Legacy or Launch CSM. There are no difficulties with how to install UEFI in standard mode downloads.
Nuances of accessing UEFI
Another interesting fact that is useful to note is that there are a large number of versions of UEFI. They can vary significantly between PCs made by different brands. At the same time, the level of availability of certain functions on different computers can also vary significantly. It often happens, for example, that when the computer boots, the menu with which you can enter the UEFI settings is not displayed. But in this case, Windows OS usually provides an alternative option for downloading the necessary options. You need to go to “Settings” and activate the “Special boot options” option.
After this, you can reboot - and several options for loading your PC will appear on the screen. Eat alternative way provide access to the appropriate UEFI options. It works on many PCs. You need to press Esc at the very beginning of the computer boot. After this, the menu in question should open.
Specifics of operation in different modes
Please note that when changing the normal UEFI operating mode to Legacy, it is advisable to use necessary programs that require disabling Secure Boot or running with BIOS emulation, re-enable the UEFI interface with all relevant options as soon as possible. Otherwise, Windows 8, as some IT specialists note, may not start. However, many PCs do not have this problem. Some manufacturer brands implement algorithms into the PC management structure that allow you to activate the UEFI mode automatically. Some PC models implement a hybrid mode, in which the UEFI system boots from any media, and BIOS modulation can be started if necessary. Differences in UEFI versions may also mean that disabling Secure Boot in the normal operation mode of the Intel software solution is not possible. To do this, you will have to activate the BIOS emulation function in any case.
UEFI and bootable flash drives
In some cases, users need to download operating system from a flash drive. The main difficulty is that a UEFI bootable flash drive having a format other than FAT32 is not recognized. But this problem can be successfully resolved. How?
So by default bootable flash drives for Windows are formatted into which UEFI does not recognize. That's why the main task- ensure that the corresponding hardware component is formatted in the more universal file system - FAT32. The most interesting thing is that many IT specialists consider it outdated. But using the example of one of the most modern software solutions, which is, of course, UEFI, we can trace the relevance of the corresponding standard.
Flash drive for booting in UEFI mode: components
What do we need to ensure that the UEFI bootable flash drive is recognized without problems? First of all, this is, in fact, a USB drive itself. It is advisable that its capacity be at least 4 GB. It is also advisable that no valuable files be placed on it, since we have to completely format the flash drive. The next component we need is a Windows OS distribution. Let it be 64-bit Windows version 7. Another feature of UEFI that should be mentioned is 32-bit OS from Microsoft given the system does not support.
Preparing a flash drive
If we have the marked components, then we can start working. First, insert the USB flash drive. Then, open the command line in the Windows interface. It is necessary, however, that the user have administrator rights. Through you need to launch the DISKPART program - simply by entering this word. After this, you need to enter the list disk command, which will display a list of disks present in the system. You need to find a USB flash drive in it. If it is number 2 in the list, then you need to enter the command select disk 2.
Formatting a flash drive
Next you need to format the media. To do this, you need to enter the clean command. After this, you need to create a primary partition on the disk. This can be done using the create partition primary command. After this, the created partition should be made active. To do this, enter the active command. After this, you can display a list of sections. To do this, enter list volume in the command line. We find the section that we created. If it is listed at number 3, then enter select command volume 3. After that, you need to format it in the FAT32 system. To do this, enter the command format fs=fat32. The basic bootable media is thus ready. But that is not all. You need to assign a drive letter to the flash drive. This can be done using the assign command. After that, enter exit and exit the command line.
Burning the distribution to a flash drive
After all the steps described above, you need to copy the Windows 7 distribution to a USB flash drive. This can also be done using the command line. How? There is a special command for this - xcopy. You need to enter it, then specify the address of the disk with the distribution kit, insert the * symbol, indicate the letter that corresponds to the flash drive intended for loading into UEFI, and then enter the command with the symbols /s /e. Then you need to go through the command line to the flash drive. There you need to go to the efi\microsoft\boot directory. It needs to be copied to the efi\boot folder. After this, you need to copy the file called bootmgfw.efi to the efi\boot folder, and then rename it to the bootx64.efi file.
The work with the flash drive is completed. A UEFI disk with the FAT32 file system, which we can just recognize without problems. Accordingly, you can install Windows 7 on a PC from it. Of course, provided that the Secure Boot algorithm is disabled in the UEFI options, which prohibits the installation of OSes that differ from Windows 8 on the computer.
With the release of Windows 8, manufacturers began to actively implement the successor to the BIOS - the UEFI interface, which during its existence has already managed to cause a lot of trouble. We will tell you how to take advantage of its benefits despite this.
The massive transition to UEFI (Unified Extensible Firmware Interface) has already begun. Microsoft requires this interface to be used on all computers that will ship with Windows 8. More precisely, we are talking about UEFI with the Secure Boot feature. At the same time, only “eight” can work on such PCs without problems: neither Windows XP nor “seven” can be installed on a UEFI machine without additional manipulations. You won't be able to boot from a Linux Live or Windows flash drive either. What exactly can happen if you try to start from an installation flash drive on a laptop? Sony VAIO, shown in the picture above. And the problems with UEFI don't end there. Each hardware manufacturer configures UEFI at its own discretion, thereby creating unnecessary difficulties for the user. The IdeaPad laptop from Lenovo was not able to recognize the same flash drive as boot media at all. At the same time, Lenovo has nothing to blame: the fact is that the bootable flash drive is formatted in the NTFS file system, and UEFI does not support booting from such media. If you connect the same drive to an EliteBook laptop from HP, it will boot without problems and allow you to install Windows. The problem is that all the data on the EliteBook disk would be deleted after installation.
Are you confused? No wonder: UEFI with Secure Boot establishes new rules for installing and booting operating systems, and hardware manufacturers interpret these rules in their own way, which creates additional difficulties for the user. Therefore, in this article, we set ourselves the goal of clearing up the confusion around UEFI. Using laptops from major manufacturers as an example, we will tell you how UEFI works, what role the Secure Boot function plays, how to bypass the “traps” set by the new interface, and what you need to use bootable flash drives without fear of any destructive consequences.
How UEFI works
The process of booting a BIOS-based PC is quite simple: after pressing the power button, the BIOS starts, which checks the status of the hardware and loads the firmware - simple drivers for individual hardware components. The BIOS then searches for the OS bootloader and activates it. This in turn loads the operating system or displays a list of available operating systems.
UEFI-based computers boot in a similar way only until the boot options are searched. After this, everything happens differently. UEFI has its own OS boot loader with integrated launch managers installed systems. For it, a small partition (100–250 MB) is created on the disk, formatted in the FAT32 file system, which is called Extensible Firmware Interface System Partition (ESP system partition). It contains drivers for hardware components that can be accessed by the running operating system. The general rule is that, with the exception of DVDs, UEFI can only boot from media formatted with the FAT32 file system.
ESP has its advantages: thanks to UEFI drivers and the OS loader, Windows starts faster and responds more adequately to critical errors drivers. But the UEFI interface also imposes restrictions: it allows you to install the OS only on hard disks, which are marked according to the GPT standard. The latter is not supported by any BIOS version, since, unlike the traditional partitioning scheme (MBR), it uses 64-bit sector addresses.
In addition to Windows 8, only 64-bit versions support the UEFI interface Windows Vista and 7, as well as Linux with kernel 3.2 and higher. Moreover, for PCs certified to work with G8, Microsoft requires the use of the Secure Boot option. In this mode, UEFI only launches verified OS boot loaders that contain Microsoft digitally signed drivers.
Along with Windows 8, only the Shim bootloader (Linux) has drivers with the necessary signatures for Secure Boot. They are not available in other OSes. Therefore, if you want to install Windows 7 or Vista on such a computer, in addition to G8, you need to open the UEFI menu and disable Secure Boot. If you choose a non-UEFI compatible OS as your second OS, you will need to use the Compatibility Support Module (CSM), which can be enabled in UEFI. Unfortunately, manufacturers use different versions of UEFI, and it can sometimes be difficult to figure out how to disable Secure Boot and enter BIOS emulation mode. We will consider these questions further.
UEFI setup
Each manufacturer uses its own version of UEFI in laptops and ultrabooks. However, it does not provide access to all the necessary functions.
Often, when loading a PC or laptop, the display does not display the name of the button that can be used to open the UEFI settings menu. We suggest doing the following: in the Metro interface, go to the “Options | Change PC settings" in the sidebar and activate the "General | Special download options." After the restart, the OS boot manager will appear, which will allow you to open the UEFI menu. The exception is HP's UEFI, which does not have this option. The following will help: while loading, hold down the "Esc" key.
In any case, you must first find out which button allows you to enter the UEFI menu (see table). If you change the boot mode to CSM or Legasy BIOS to boot from a rescue flash drive, you must switch back from CSM to UEFI after the recovery operation, otherwise Windows 8 will not start. But there are exceptions here: Aptio Setup Utility on ASUS computers activates UEFI automatically if there is no compatible one Boot BIOS media, so you just need to disconnect the flash drive.
Disabling Secure Boot will be required if, in addition to G8, you want to install a 64-bit version of Windows Vista or 7. Sometimes the so-called hybrid mode is supported, as in devices from HP, in which UEFI can boot from all bootable media and, if necessary, switch to BIOS mode.
In the widely used UEFI version InsydeH2O, this depends on whether the laptop manufacturer has provided the ability to disable Secure Boot or not. IN Acer Aspire S7 this function is not available, and to deactivate it you need to switch from UEFI to BIOS mode and back.
Difficulties with recovery
With the advent of UEFI, manufacturers changed the way they work with the OS recovery system. The “Alt+F10” keyboard shortcut, which was previously used, for example, in Acer models, no longer works or is assigned to other functions. And the “F9” button loads on the new Zenbook not the ASUS Preload Wizard, but the program Windows recovery 8 with extended boot menu.
The VAIO Care recovery mode in Sony laptops can be opened in a similar menu by selecting the “Control Panel | Troubleshooting | Recovery". But if you start the OS boot manager and select “Diagnostics | Restore" or "Return to the initial state", the device will ask you to insert the original Windows disk 8, which is not included in the package. On Acer models, backup is performed using a pre-installed Windows program, and restoration from backup copy carried out from an external USB drive. However, you must first go to the UEFI menu and specify such a disk as a boot one.
Run from a flash drive
Older flash media for emergency boot and recovery only work in BIOS mode. We will make them UEFI compatible.
USB flash drives have recently become increasingly used as bootable media for restoring or installing Windows. This is due to the fact that modern laptops rarely have optical drives. If you have examined the UEFI settings on your computer, it is recommended that you also upgrade your flash drives. With the advent of UEFI, all existing bootable flash drives can no longer be used in the usual way. For example, if you created a bootable USB media using UNetbootin, you will need to start your PC in CSM mode. The same applies to all old flash drives, since the developers Linux distributions Live (eg GParted) only in the latest, most latest versions their applications began to add a bootloader with UEFI support and Secure Boot functions.
The simplest method is to disable Secure Boot in UEFI, then use free program Rufus (available on the CHIP DVD) creates a UEFI compatible flash drive and then copies it to it latest version GParted.
For bootable USB drives running the Windows operating system, slightly different rules apply. To be UEFI compatible, they must be formatted with the FAT32 file system. Many users, even for Windows 8, create bootable drives on flash drives formatted using a program from Microsoft, part of the “seven”. However this application by default formats the drive in the NTFS file system, as a result of which the system on the media cannot subsequently be installed on a computer with UEFI. To avoid waiting for an updated program from Microsoft, you can create a bootable drive manually.
To do this, first format the USB flash drive using free utility. Then open the ISO image in Windows 8 and copy the files it contains to the media. But in order for a UEFI-compatible flash drive with 64-bit Windows 7 to boot without any problems, you will need to copy the UEFI boot loader to the desired directory on the flash drive. To do this, using the free 7-Zip archiver, find in ISO image, which contains installation Windows files 7, in the Sources folder, install the archive file Install.wim and open it. After that, copy the bootmgfw.efi file from the 1WindowsBootEFI directory. Then save it to your flash drive in the efioot directory and rename it bootx64.efi. After this, you can work with the USB drive in UEFI mode, and you will be able to install Windows 7 from it without any problems.
Bought Asus laptop, I wanted to boot from the boot disk to reinstall Windows 8, on Windows 7, I can’t boot from the disk, what should I do?
You need to disable the so-called mode - Secure Boot
We just find the image with our BIOS and watch how UEFI is disabled in it.
Secure Boot is a security feature created in 2012 by Microsoft as a result of which it cannot be delivered in priority BIOS boot on CD / DVD disc which means you can't boot the drive and you can't prioritize booting to USB, whether it's a USB flash drive or an external hard drive external drive. Access I.e. completely closed, but you can disable this protection provided.
Depending on the method to disable manufacturers, they may differ from those described here, but in general, the essence remains the same. The main thing to understand is that the purpose of Secure Boot is official keys, which the user must purchase at his own expense. Here are the 3 most common BIOS (and instructions on how to disable UEFI):
In older BIOS versions, disabling Secure Boot was quite easy:
In new BIOS versions, Secure Boot is much more difficult to disable. We just find our image (or images) and look at them as this very Secure Boot is disabled.
2nd option:
Select Security Boot Parameters
For OS type, select Windows 8 UEFI. (Even if you want to install a different OS)
Click on key management
Set the default Provisioning key to Disable.
Then, click on secure key download to remove all old keys
Then paste boot disk or flash drive
Third option:
Red window appears, press F10 (Ascept)
Then start from the bottom:
Owership key select custom
Existing Support Select Enabled
then look at the boot order (if necessary, disable UEFI sources for loading the operating system by pressing F5) and save the settings
A little explanation:
1) Uninstalling Windows 8 s hard drive does not affect secure boot, since this function is built into the BIOS, as well as the BIOS on motherboard. So even if you are in command line commands through DiskPart, list of disks and clear, delete all partitions, then ultimately when you start you only see this message here:
2) Make sure to switch to the custom control keys, otherwise you will see the result of a message like (pressing the combination listed 2948 + Enter will not help you in response to the reaction you will not see):
UEFI BIOS is a software solution that is an alternative to the BIOS system, to which most computer users have long been accustomed. This is not to say that this is a completely new development. Work on creating an interface between the OS and firmware responsible for low-level hardware functions began in the second half of the 90s. Initially, this interface was called the Intel Boot Initiative. A little later the name was changed to EFI.
The first specification of this interface, released by Intel in 2000, demonstrated its clear advantages over classic BIOS. Therefore, it is supported in most modern motherboards. Today we will talk about the features and advantages of UEFI. But to do this, you first need to understand what BIOS is.
What is BIOS?
This is a software solution built into a chip on the motherboard. This firmware ensures data exchange between computer components and the operating system. That is, due to BIOS Windows has the opportunity to work with RAM, motherboard, processor, video card and other components.
BIOS is initializing much earlier Windows boot . The firmware is tasked with checking all the computer systems that we listed above. In addition, the BIOS sets them the necessary operating parameters.
If a faulty computer component is detected during the POST procedure, the BIOS will transmit a code sequence through a small speaker sound signals, by which the user can determine which part is faulty.
Why did software and hardware developers decide to abandon BIOS in favor of UEFI?
Tom there are several reasons:
For these reasons, leading brands provide UEFI support in modern motherboards.
Main advantages of UEFI
UEFI, unlike BIOS, is not a firmware and a miniature operating system, but at the same time she took a lot from her predecessor. The tasks of UEFI are exactly the same as those of BIOS - relationship software and computer hardware. The new interface checks the hardware in the same way before launching the Windows boot loader.
To the main advantages of UEF I can be attributed to:
The new interface supports mouse control.
It is intuitive and supports many languages. Setting it up does not cause any problems.
- UEFI, unlike BIOS, works great with hard drives that have GPT.
- UEFI BIOS provides the ability to work with hard drives with a capacity of more than 2 TB.
- Hard drives with a GUID table operate with the new LBA addressing.
- Windows starts much faster in UEFI.
- UEFI has its own bootloader, which allows you to use several operating systems on one computer without using special bootloaders.
- UEFI BIOS is very easy and safe to update.
As for “Secure Boot”, this procedure is still considered a dubious advantage. As mentioned above, if you do not disable it, then installation of any operating systems other than Windows 8 and 10 will be impossible.
There is an opinion that Microsoft is actively promoting the “Secure Boot” procedure in order to fight competitors, because not only old operating systems cannot be installed on new computers Windows systems, but also third-party operating systems. Some will say that to solve the problem it is enough to disable this procedure, but then the user will be deprived of all the benefits of working with hard drives that have a GUID.
Microsoft responds to all accusations in the same way - the protocol was developed for user safety. And there is nothing to counter these words with, because “Secure Boot” really provides high level protection.
Today the user can encounter With different versions UEFI. The fact is that the interface is developed by manufacturers personal computers. Therefore, UEFI differs from different brands in appearance and functionality. For example, when starting a computer, the user may not see a menu to access interface settings. As a rule, the user can later access them directly from the Windows OS. In this case, the user can correct the situation by selecting the “Special boot options” mode in the “Options” tab. After the reboot, a menu of available boot modes will appear at startup.
An alternative option for accessing UEFI settings is to press the ESC key on the keyboard when the computer starts.
UEFI can operate in two modes:
- Ordinary. Provides full access to interface options.
- Legacy. It is not recommended to install this BIOS compatibility mode if the hard drive size exceeds 2 TB. The operating system may stop loading. Moreover, if the system has a disk with a capacity of more than 2 TB, then UEFI automatically activates the normal mode with its “Secure Boot”. If at the same time there was a version of Windows on the disk other than 8 and 10, then it will not start.
Exists third UEFI operating mode– hybrid, but it has so far been implemented on a small number of computer models.
Another important feature of UEFI is that it does not recognize file NTFS system. That is, you cannot install the OS from flash drives formatted in NTFS. Some computer experts consider this a drawback of the new interface.
What do you need to do to install Windows UEFI?
Installing Windows via UEFI is a little more difficult than installing via BIOS. First, the user needs to create a bootable USB flash drive.
If the user intends to install Windows 10, then to create and configure a flash drive, you can use official utility from Microsoft Media Creation Tool. It is very simple to use: you need to insert a USB flash drive into the computer connector and run the utility, which will determine everything removable media in the system and will prompt you to select the required option. Next, the user will need to carry out a simple setup: select the operating system bit depth and language.
A bootable USB flash drive can also be made using third-party utilities. It's not much more complicated.
The next step is to configure the UEFI BIOS for installation. To access the interface settings, press F 2 or Delete when starting the computer. After launching the menu, you need to select the “Advanced” subsection. In the “boot” tab, you need to select USB support mode with full initialization. On the “Secure Boot” tab, do not forget to select the “Windows” mode UEFI mode" To complete the setup, you need to set the priority for using boot devices. From the available list, select the flash drive with the OS distribution.
After this you can install Windows.
If you receive a message during installation of Windows 8 or 10 about incorrect setting secure boot, then most likely the user forgot to enable the “Secure Boot” procedure in the UEFI BIOS. To fix the error, just enable secure boot mode.
How to install Windows 7 via UEFI BIOS?
At Windows installation 7 via UEFI BIOS the user may encounter 2 problems:
After pre-configuring UEFI to enable and disable the necessary functions, you can begin installing the OS from a flash drive, CD or DVD.
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