There are viruses that are almost harmless and imperceptible, which for the time being (or rather, until a complete serious scan) cannot even be detected. But there are really dangerous ones. The latter can seriously affect both the operation of the computer as a whole and the performance of its individual functions. Such malware includes those that block access to the Internet or certain utilities.
It happens that an insidious virus blocks antivirus sites so that the user cannot seek help and eliminate the threat. It also causes the program to stop working at the same time. automatic update. In many cases even manual update antivirus program does not work. At the same time, you can access other sites without difficulty, as before.
What to do if a virus blocks sites? The solution to the problem will be to “cure” the computer from this. Due to the specific nature of the virus, this task is greatly complicated. The database of the installed anti-virus program may simply not contain information about this pest, and it is unlikely that it will be possible to update it in the usual way. Just as it won’t work to download another one from the Internet.
The virus blocks antivirus sites: what is the danger?
The problem is that by the time the user comes to his senses and discovers problems, the virus has already managed to make negative changes in the system. It even happens that the malicious program has already been eliminated, but its effect has not stopped. After all, the changes she made to the system have not been undone. Therefore, all restrictions on sites continue to apply until the computer owner returns the settings to their original state.
How does a virus block search engine sites?
The most common reason why a virus blocks websites is changes in the hosts file. It is responsible for mapping hostnames to IP addresses. Every time you enter a search query, the computer accesses this file. And based on the information specified in it, it connects or does not connect to the specified site. Thus, hosts file- this is a kind of Achilles heel. Any changes to such a file are fraught with problems and lost connections. That is why he is targeted by an insidious virus that blocks sites.
The main purpose of such intervention, of course, is to make it difficult to rid the computer of malware. This is very common behavior. The recording used by the virus to block sites may look different. For example, like 388.113.44.1 yandex.ru for Yandex search engines. This is enough to prevent the computer from connecting to the site: it will mistakenly access the specified incorrect address.
Solving problems manually
In order to correct the consequences of malicious interference, as well as to prevent it, you can use several tricks. First you need to find the hosts file. He is in system folder Windows, the full path to which usually looks like C:\WINDOWS\system32\drivers\etc. The last folder contains the file you are looking for, whose properties should be changed slightly. By clicking on it right click mouse, you need to open the corresponding item and cancel the “Read Only” attribute in it. In some cases there is no checkmark, then you can proceed to next step.
After the changes have been made, the file must be opened in Notepad or a similar program. The simplest and most universal option would be to delete all entries except one: 127.0.0.1 localhost. You can also view the contents of the file more closely and delete only records about the addresses of those sites that are blocked. It is important not to forget to save the changes made and return the file to Read-Only attribute, otherwise your efforts will be in vain.
Unfortunately, this option does not always work. If the above steps do not have any effect, it is recommended to try AVZ program. This utility is designed specifically to search for and eliminate such viruses and the consequences of their presence on the computer. Having launched it, you need to select the “File” item, and in it - “System Restore”. The items that need to be marked are 21, 20, 15, 14 and 13, as well as 9, 8 and 6. After a few minutes, the utility will complete its task.
After completing AVC, it is strictly not recommended to immediately connect to the Internet. One more operation needs to be done first. At the command line (“Run”), enter cmd. This will bring up a console in which you need to write the command ipconfig /flushdns. Pressing the enter button starts the cache clearing process. But that is not all. The last step is to run the route -f command. After this, you can safely restart your computer and access the Internet.
But no viruses. No internet - no problem
On December 5-6, many users of the AVAST antivirus encountered the following problem: without any apparent reason Lost connection to the Internet and local network. This was preceded by his discovery of a certain rootkit Win32:Malware-gen, after the removal of which these misadventures for users begin. The file turned out to be a "virus" tcpip.sys which is responsible for network connections on the computer. This false alarm led to catastrophic consequences: the activities of many thousands of users were paralyzed, provider phones overheated to red hot from calls from dissatisfied customers, customer service and system administrators without lunch, sleep and rest they are knocked off their feet, eliminating the consequences of this collapse.
The first thing to do was, of course, ignore this warning and add the tcpip.sys file to the exclusion list.
But if you are reading these lines, then most likely you or someone you know has already fallen for this bait and now has there is no network activity: sites do not open, local network no, returns the result “Configuring the IP protocol for Windows. Happened Internal error: This request is not supported. Contact Microsoft Product Support for further assistance. additional information: Failed to query hostname." Team ping returns the result “Unable to access the IP driver. Error code 2."
In the System Event Log we see the following warning: "The DHCP Client service is dependent on the TCP/IP Protocol Driver service, which could not be started due to an error..."
The DNS Client and DHCP Client services do not work for the same reason.
How to restore the Internet and network?
Options for solving this problem, after a long reluctance to admit the problem, appeared on the official website of the Avast company.
For “non-advanced” users (and for those who are too lazy to understand), the user “Obramko” (forum.avast.com) created a couple of programs that automatically solve this problem:
- Download the file for your version of Windows, transfer it to a flash drive or other storage medium.
- Disable your antivirus (Manage screens - disable everything permanently).
- Launch the file.
- Reboot your computer.
- Update your antivirus and turn it back on (Manage screens - turn on all). After the update, it no longer blocks the Internet and the network and you can continue to use it successfully.
Summary
In our age of new technologies, an antivirus for a computer can be compared to a virus vaccination for a person. If your antivirus works poorly, then most likely your PC will not live long. But it also happens that after installing an antivirus you cannot access the Internet. This situation often occurs in Avast antivirus.
Avast blocks the Internet
Users may have encountered a situation where Avast blocks Internet access. It does not allow you to open any page in any browser. Avast Antivirus blocks all network connections.
This situation can be caused by many reasons. Therefore, the problem will have to be solved accordingly to each of them.
Important! Most often, blocking occurs on a PC with Windows XP.
We are looking for a way out of the situation
You can do what most users do and just with. You can say goodbye to Avast at any time, so let's first figure out how to solve the problem and leave the antivirus (read about removing Avast antivirus).
First of all, you need to understand two things - why Avast blocks all sites and why Avast blocks the Internet. If the program blocks only one site, then perhaps it really is infected with a virus (you can read how to add a site to Avast exceptions).
But if, when you launch all browsers, a notification appears about blocking malicious screens, then you should act differently:
After you do everything according to the instructions, the problem with connecting to the Internet will be resolved. Now you can solve the problem yourself: “Why is Avast blocking the browser?”
It happens differently
In cases where even these steps did not help fix the problem, the conclusion arises that your computer has caught a virus. In this case, it is better to show it to a specialist and not worry about how to correct the situation. Why? Because if you are not an expert, you can do even worse (for example, delete important system files). Therefore, do not immediately believe everything you find on the global network.
Be attentive to alerts on your computer screen and listen to advice.
I hope you found this information helpful. Good luck everyone!
If the Internet does not work and there is no way to call a specialist urgently, you can try to adjust the settings yourself using our article.
Advice: before looking for methods to solve problems in the network and router settings, check the status of your account with the provider and the security of the network cable; in approximately half of the cases this solves the problem.
Firewall or antivirus?
Sometimes, Internet access can be blocked by the system's own security agents, such as a firewall or antivirus. Determining whether the Windows 8 firewall is disabled is quite simple - disable it in the system settings and check the connection; if the network appears, the problem has been detected.
If the ban comes from the antivirus, you need to disable the program itself or end the corresponding processes through the task manager.
Setting up Firewall in Windows OS
The main function of a firewall is to check data coming from the Internet and block those that cause concern. There are two modes: “white” and “black” list. White - block everything except what is allowed, black - allow everything except what is prohibited. Even after full customization The firewall still needs to set permissions for new applications.
To find the firewall:
If you already have an antivirus installed, disable the firewall as shown in this picture.
Blocking outgoing connections
The firewall and sometimes antivirus can completely block all outgoing connections.
To block outgoing connections with a firewall in white filter mode, you need to:
- go to the “advanced settings” of the firewall;
- open the “Properties” window;
- set “outgoing connections” to “block” mode in private and public profiles.
Application Rules
There is a special list of programs that are allowed to exchange data with the Internet, and if the one you need is blocked, you just need to configure permissions for it in this list. You can also set up notifications so that if a new application is blocked, you have the choice to leave everything as is and allow access to that program.
For example, you can block Internet access for Skype or Google Chrome, or vice versa, leave access only for a couple of specific work programs.
Video: Network without Internet access
Service Rules
To configure access for services:
- go to the advanced firewall settings;
- on the left select incoming or outgoing rules;
- On the right, select “Create a rule”;
- Select “Custom” from the list;
- enter the service name or select it from the list provided.
In new Windows versions Beginning with Vista, you can select a service from a list without manually entering the service name. If you do not have access to a computer in windows networks xp or windows server, you need to configure the access policy service, then detailed description can be found in the system help.
Activate the reserved rule
To activate a reserved rule, you need to repeat steps 1-3 from the previous section, then:
Allow VPN connection
To set a special permission VPN connections, you need to repeat steps 1-3 again, then:
Setting up an antivirus
If problems arise, one of best options– go to the antivirus website or contact product technical support, they will tell you exactly correct settings programs.
An antivirus should not block working programs - like Google Chrome or Skype, but should check them while working.
Safe antivirus settings should include:
Update
The antivirus update must be current, either with the release of new versions, or monthly automatically.
No network access in Windows 7
If when connecting you see " Unidentified network", but all the settings are in order, contact your provider first - this may be an internal error.
After Windows reinstallation Internet settings usually return to their original settings, so you need to set them again:
The problem may be caused by errors Windows protocol To fix this, you need to reset the protocol settings.
It's pretty simple:
- run command line with administrator rights;
- enter and activate the command netsh int ip reset resetlog.txt;
- reboot the laptop.
Is the problem with the router or the laptop?
When WiFi connectivity issues occur, you need to determine where the problem is coming from. This could be a laptop, router or ISP. If all devices connect to the router and work normally with the Internet, the reason is in the laptop; if, on the contrary, you connect network cable to the laptop and the Internet will work - you need to set up the router settings. When all else fails, contact your provider's technical support.
The reason is the laptop
If the problem is in the laptop, but all of the above settings are in order, diagnose the system for viruses and device operation. Possible operational problems network driver or even disruptions directly network card, connector.
May not match WiFi password dots, for example due to incorrect layout or CapsLock.
The reason is the Wi-Fi router
Router at incorrect settings can distribute WiFi without access to the network. Read on to learn how to properly configure your router.
One of the reasons for connecting without a network may be to protect the Wi-Fi network from unauthorized access by blocking it by MAC address. You can find out how to fix this problem on the router manufacturer’s website, or you can independently find the list of allowed or blocked addresses in the settings and add or remove the address of your laptop.
You can view the MAC address of your laptop by entering the Ipconfig / all command in the command line.
Also, the router has speed limit settings for each client, so you can either allow the maximum speed or limit it to a couple of kbsec.
Problems with Internet speed may be a signal for help from the router itself - perhaps you have not removed the factory film from it, it is covered with something or is overheating for other reasons. If you do not provide the device with normal ventilation, it will not last long and will be extremely ineffective.
Checking the Internet connection without a router
If you suspect the router is causing the problems, you need to connect the network cable to your laptop or computer to check. If the Internet does not work automatically, create a new cable connection, enter the login and password provided by the provider. You may need to enter additional settings protocols in the adapter properties.
Setting up an Internet connection
To check whether your computer's IPv4 settings match those stated by your provider, you need to do the following:
- check the IPv4 address and gateway, they must match those provided by the provider during registration.
Setting up a connection through a router occurs through the device’s web interface. The router sometimes comes with a settings disk, but you can do without it. For initial setup It is best to connect the router directly to the laptop, and then to the Internet cable; connecting to the power supply is done last.
If you don’t have enough time to wait for a specialist, you don’t want to spend money, and you feel like a confident PC user, then using various instructions and recommendations, you can try to set up an Internet connection yourself. Most likely, it will take two to three times more time and energy than contacting a specialist, but it will provide useful experience in the future.
>For many, the antivirus blocks the entrance to the game, swearing that the game contains viruses. Although in fact there are no viruses there and the Anti-Virus is simply playing it safe. When you are advised to disable/uninstall your antivirus, you become indignant, and when asked to add a game to the list of trusted programs, you rarely react. This Guide will describe how to add Cabal to the list of trusted antivirus programs so as not to disable it (after all, during the game we can climb websites and so on, just in case something happens) and, moreover, not to delete it (for many this is unrealistic).
1. Panda Antivirus
1. Launch Panda Antivirus + Firewall double click left mouse button on the program icon in the notification area (on the Taskbar, next to the clock);
2. Select the "Settings" menu item;
3. Select "Automatic protection settings";
4. Select "Configure scan exclusions" - here you can, by clicking the "Add" button, specify a list of programs that will be excluded from the scan.
5. Find the folder where the game is installed (by default "D:\dayz\dayzsib")
2. Avast!
1. In the taskbar, right-click on the Avast!
4. Find the folder where the game is installed 1. In the taskbar, right-click on the Avast!
2. Select the "Program Settings" menu item.
3. Exceptions tab, select Review.
4. Find the folder where the game is installed (by default "D:\dayz\dayzsib") and check the box next to it.
5. Click OK to save the settings. check the box next to it.
3.AVG
2. B context menu select "Launch Control Center".
3. Click "AV Resident Shield > Properties" and select the "Excludes" tab.
4. Click "Edit Excludes" and select "Use excludes in AVG Resident Shield".
5. Click "Add Path" and find the folder where the game is installed
6. Click OK 3 times.
7. Restart your computer.
4. Avira AntiVir Personal Edition Classic, Avira Antivir Personal Premium
1. In the taskbar, right-click on the AVG icon;
2. Select the "Configure AntiVir" menu item.
3. Check the "Expert mode" checkbox.
4. Click "Guard - Scan" (click the "+" sign) and select the "Exceptions" menu item.
5. Click "Browse" (...) and find the folder where the game is installed (by default "D:\dayz\dayzsib")
add it to the exceptions.
6. Click "Add" to add a folder.
7. Click "OK" to save the settings.
example of antivirus exceptions + disabled heuristic protection, in the screenshots:
5. BitDefender
1. Open BitDefender. Select Antivirus > Shield.
2. Click Custom Level.
3. Expand Exclude Path From Scan (applied to ALL LEVELS) and click New Item.
4. Find the folder where the game is installed (by default "D:\dayz\dayzsib"), add it to the exceptions. click OK.
5. Click OK to save the settings.
6. DrWeb SpiderGuard
1. Right-click the Spider Guard icon in system area taskbar.
2. Select Settings from the drop-down menu.
3. In the Paths tab, select Browse under Excluded folder and files.
4. Add the path to the folder where the game is installed (by default "D:\dayz\dayzsib"), and click Add.
5. Reboot your PC.
GData AntiVirusKit
1. Right-click the G Data AntiVirusKit 2006 icon and select Launch AntiVirusKit.
2. Click Options.
3. On the Monitor tab, click Exceptions > New.
4. Select Directory and specify the path to the folder where the game is installed (by default "D:\dayz\dayzsib"), add it to the exceptions.
5. Save the settings by clicking OK 3 times.
6. Close the AntiVirusKit window.
7. Kaspersky Antivirus 5.0
1. Open the Kaspersky Anti-Virus window.
2. Select the Settings tab.
3. Click Threats and Exceptions.
4. Click Add > Browse (...).
5. Find the folder where the game is installed (by default "D:\dayz\dayzsib"), click Select and save the changes.
6. Restart your computer.
8. Kaspersky Antivirus 6.0, Kaspersky Internet Security 6.0
1. Please follow the instructions on Kaspersky Labs or here:
2. Right-click the Kaspersky Anti-Virus icon in the system tray and select Settings.
3. On the Security menu, click Trusted Zone.
4. On the Exception Rules tab, click Add.
5. Make sure the Object is checked.
6. Click Specify. Using the Browse button, find the folder where the game is installed (by default "D:\dayz\dayzsib")
7. Click OK.
8. Click Specified so that the Description field (click the underlined options to change) looks like this:
Object: "D:\dayz\dayzsib\5street
Component: any
9. Click OK to save your changes.
10. Select the Trusted Applications tab.
11. Click Add and specify the path to the executable D:\dayz\dayzsib\you may need to point to the 5street file
12. Check all the boxes in this window and click OK three times to save the settings.
9. Kaspersky Antivirus 7.0, Kaspersky Internet Security 7.0
1. Right-click the Kaspersky Anti-Virus icon in the system tray and select Settings > Threats and exclusions > Trusted zone.
2. On the Exception Rules tab, click Add.
3. Make sure the Object is checked.
4. Click Specify. Using the Browse button, find the folder where the game is installed (by default "D:\dayz\dayzsib")
5. Click OK.
6. Click Specified so that the Description field (click the underlined options to change) looks like this:
The object will not be scanned if the following conditions are met:
Object: "D:\dayz\dayzsib\may need to point to file 5street
Component: any
7. Click OK to save your changes.
8. Select the Trusted Applications tab.
9. Click Add and specify the path to the Launcher/game executable file – D:\dayz\dayzsib\you may need to point to the 5street file
10. Check all the boxes in this window and click OK three times to save the settings.
10. Kaspersky Antivirus 2010, Kaspersky Internet Security 2010 (9.0.0.736)
1. Right-click the Kaspersky Anti-Virus icon in the tray and select Settings.
2. Click Threats and exceptions.
3. Click the Settings button in the Exceptions section.
4. Click Add.
5. Click Select object.
6. Click Review.
7. We look for the folder with the game, click on it once with the left button so that the path to the folder appears in the Folder field. Click OK. (Default folder path:
8. Do not uncheck the “Including subfolders” checkbox, click OK.
9. Click OK.
10. Click OK. (If step 7,8,9 is difficult to apply without screenshots, please let me know, I’ll do it, I was just too lazy to paint over it)
11. Click Apply and Ok.
1. Open NOD32 Control Center.
2. Select AMON.
3. Select Settings.
4. Select the Exceptions tab.
5. Click Add > Folder.
6. Add the folder where the game is installed (by default "D:\dayz\dayzsib"), add it to the exceptions.
7. Make sure that Folder is selected in the Excluded objects field.
8. Click OK twice to save the settings.
12. NOD32 (version 3.0)
1. Right-click the NOD32 icon and select Open Window.
2. Select Setup > On. advanced mode > Yes.
3. Select Enter Entire Advanced Options Tree.
4. In the Virus Protection and spyware Click Exceptions > Add.
5. Find the folder where the game is installed (by default "D:\dayz\dayzsib"). Click OK to save the settings.
13. Microsoft Security Essetials (Windows 7)
1. Left-click the MSE tray icon and select "Open".
2. Select Options -> Excluded files and folders
3. Click the "Browse" button and select the folder/file. If you need to add multiple folders/files, repeat the procedure.
4. Click the "Add" button, the path to the folder/file will be displayed in the lower field.
5. Click "Save Changes"
14.AVG2012
1. If you are in English, then
-components
-anti virus
-bottom left Manage exceptions
-add file or add path (immediately add a folder, default folder address: "D:\dayz\dayzsib")
2. If you have the Russian version, then
Open the AVG program -> Tools menu -> Advanced Options -> PUP Exceptions -> click the Add Exception button to add a new exception.
Now navigate to the file you want to exclude from AVG's list of discoverable objects. If you are not sure where the file is located, enable the "Any location - do not use full path" feature.
To save the settings, click the "Add" button. If you are sure where the file\folder is located, then specify the full path (default path: "D:\dayz\dayzsib")
Loading...
