AVG is by default scheduled to look for new updates every four hours.

Since AVG updates are not released according to any fixed schedule but rather in reaction to amount and severity of new threats, it is recommended to check for new updates at least once a day. Checking every 4 hours will guarantee that your AVG Virus dabase is kept up-to-date all the time.

For more information on setting the AVG update schedule, please see FAQ 3495.

If you are using a third party firewall or software that checks network traffic, it is necessary to allow communication for the following processes to ensure correct AVG functionality:

• avgam.exe
• avgcmgr.exe
• avgcsrvx.exe
• avgcsrva.exe
• avgdiag.exe
• avgemc.exe
• avgfws9.exe
• avgiproxy.exe
• avgnsx.exe
• avgnsa.exe
• avgrsx.exe
• avgrsa.exe
• avgscanx.exe
• avgscana.exe
• avgtray.exe
• avgui.exe
• avgmfapx.exe
• avgwdsvc.exe
• avgidsagent.exe
• avgidsmonitor.exe
• avgdiagex.exe

For correct AVG updating and overall functionality, it is also necessary to allow the following URLs in some programs, firewalls and proxies:

• update.avg.com
• download.avg.com
• backup.avg.cz
• pupdate-af.avg.com
• idpakamai.avg.com
• qh-afcn.avg.com
• *.akamai.net
• *.deploy.akamaitechnologies.com
• stub.avg.com
• akamai.avg.com
• akamai.avg.cz
• akamai.grisoft.com
• akamai.grisoft.cz
• *.mailshell.net
• akamai.grisoft.cz.edgesuite.net
• akamai.avg.cz.edgesuite.net
• akamai.grisoft.com.edgesuite.net
• akamai.avg.com.edgesuite.net
• *.cloud.avg.com
• *.sanasecurity.com

AVG automatically updates on a regular basis, making sure that your protection is always up-to-date. Although it is not necessary, you can also update your AVG program manually at any time.

There are several ways to update the AVG program manually:

Open the AVG program (double-click the AVG icon on your desktop or double-click the AVG icon in the system tray next to the clock).

• Click the Update now button in the left part of the AVG program.
• Or on the Tools menu, click Update.

It is also possible to update AVG by right-clicking the AVG icon in the system tray next to the clock and selecting the Update now option.

AVG regularly updates the virus database to ensure protection against the latest threats. When the AVG program detects that the virus database is older than one week, it displays a message with the text "Database is outdated." To resolve this situation, please proceed as follows:

Try to update AVG

1. Open the AVG Program.
2. On the left side of the window, click Update now.
3. If a list of available updates is displayed, click the Update button in the newly opened window.
4. If the update proceeded correctly, but AVG still reports that the virus database is out-of-date, continue by checking the system date and time.

Check your system date and time
AVG will notify you if your computer date is set incorrectly. In this case, please proceed as follows:

Try deleting the temporary update files

1. Open the AVG Program.
2. On the Tools menu, click Advanced Settings.
3. On the left menu, expand the Update item, and then click Manage.
4. Click Delete temporary update files, and then click Yes.
5. Try to update AVG.

If AVG cannot be updated due to issues with the connection to our update servers, please refer to FAQ 3446.

It is possible that you may experience that update is not working after upgrading your AVG 9.0 to AVG 2011. To resolve this situation please follow these steps:

• Navigate to the following folder:
  Windows XP:
  C:\Documents and Settings\All Users\Application Data\AVG10\cfgall\
  
  Windows Vista, Windows 7
  C:\ProgramData\AVG10\cfgall
  
  Note: Some files or folders may be hidden by default. To view hidden files and folders please visit FAQ 2009.
• Find and delete the updateall.cfg file.
• Try to run the update again, it should proceed correctly now.

If the update is not running even after performing these steps, please contact AVG Customer Support by following instructions in FAQ 2216.

If you receive error messages "Invalid update control CTF file" or "A .bin file is missing" during AVG update, please try to delete temporary files used during update. Please follow these steps to delete them:

1. Open the AVG program (double-click the AVG 2011 icon on your desktop).
2. On the Tools menu select Advanced Settings.
3. Navigate to the Manage option in the Update branch.
4. Click Delete temporary update files.
5. Try to update AVG.

If the issue persists even after performing the steps above, please contact us using the Get Help Online option in AVG Help menu.

More information about contacting AVG Customer Services can be found here: How to contact Customer Services

Note: This FAQ article is intended for server operating systems only.

In specific situations, AVG installation or update on a server can fail with the following message:

Severity: Error
Error code: 0xC0070643
Error message: General internal error.
Additional message: ProcessAvgLicense: Processing license failed (0xE0010406)
Context: MSI custom action

The error may be caused by using an incorrect AVG license number on your server, i.e. home security AVG or AVG Free edition license. Please activate your AVG with a license number matching with your AVG edition, as described in FAQ 3583.

In case that AVG was previously installed on a server using an incorrect license, also following error can be displayed when re-activating the license number:

An error occurred when saving the configuration.
The license number does not allow using of the product on this operating system.

To solve the issue, it is necessary to uninstall AVG and then to install it again with an appropriate license number:

• The installation package is available in the Download section of our website (filename of the package needed for the installation on a server starts with letters avg_msw)
• General instructions for AVG 2011 installation are available in FAQ 3250
• Recommendations for installing AVG on server operating systems can be found in FAQ 3266

Virus database update schedule
If you want to modify/disable the AVG virus database update schedule you can do it this way:

From the AVG program

1. Open the AVG program.
2. Double-click the Update Manager component.
3. In the Update Manager Settings section you can disable (clear the Start automatic updates check box) or modify the settings of the AVG virus database update schedule.

From Advanced settings

1. Open the AVG program.
2. On the Tools menu, click Advanced settings.
3. On the left menu, expand Schedules, and then click Virus database update schedule.
4. Here you can disable (clear the Enable this task check box) or modify the settings of the AVG virus database update schedule.

Program update schedule
If you want to modify/disable AVG program update schedule you can do it this way:

1. Open the AVG program.
2. On the Tools menu, click Advanced settings.
3. On the left menu, expand Schedules, click Program update schedule.
4. Here you can disable (clear the Enable this task check box) or modify the settings of the AVG program update schedule.

If you try to update AVG and receive an error message with the text Update failed. Connection with update server has failed., one of the following reasons may be the cause:

The connection to AVG update servers is blocked
If you are using a Firewall or a Content filtering applicaiton, please make sure that it is not preventing AVG from connecting to the Internet. If you are using Windows Firewall, AVG will be automatically allowed during the installation. However not all firewall or content filtering solutions offer this possibility. You can temporarily disable the program to verify whether it is affecting AVG, or you can add AVG files and servers to its exceptions. For a list of files used by AVG and servers to which AVG connects please see FAQ 3487.

You are using a dial-up connection

If you are using a dial-up connection, configure AVG to use this connection.

1. Open the AVG Program.
2. On the Tools menu, click Advanced settings.
3. On the left menu, expand Update, and then click Dial-up.
4. Select the Use dial-up connections check box, and then fill in the required information.
5. Click OK, and then try to update again.

 AVG can be updated from local storage (for example, CD, hard drive files, USB flash drives). To update AVG from a directory, please follow these steps:

1. Open the AVG Program.
2. On the Tools, click Update from directory.
3. Navigate to the folder where the AVG update files are stored, and then click OK.

AVG update files can be downloaded from:
http://www.avg.com/update

On this page you can find a number of modules for download. Here is description of their purposes:

• All necessary modules - Program update. When applied, AVG components are updated to the latest versions. The Virus Database is not affected.
• LinkScanner DB full - Complete LinkScanner detection database update. Improves the detection of harmful websites.
• Additional module: ifw - Update for Firewall database. Enhances AVG Firewall detection of known applications.
• Additional module: ichjw - Update of certificates database for core component. Adds detection of new trusted applications, which improves scanning speeds.
• Additional module: idat - Update for Identity Protection (whitelist). Improves detection.
• AVI - First part of the virus database update. Improves detection for components (e.g. Resident Shield, Online Shield, scans).
• IAVI - Second part of the virus database update. Improves detection for more components (e.g. Resident Shield, Online Shield, scans).

Please note that it is NOT possible to update AVG from folders in the following locations:

• shared folders (without access rights for Everyone or System)
• substituted drives
• emulated drives
• other resources with limited access for System account

AVG contains a feature that checks your computer's date in order to prevent displaying incorrect information about status of your virus base updates. In case a discrepancy is detected, the following message is displayed:

Your computer system time seems to be inaccurate. This may lead to false virus database up-to-date reporting. Please correct your system time if possible.

In order to fix your computer date and time and restore the correct function of AVG update, please proceed as follows:

In some unique cases, the mentioned message can be displayed incorrectly, even when your computer date and time is correct. In such a case, you can disable this check in AVG the following way:

• Run AVG.
• From top menu Tools select Advanced settings option.
• Select Update from the left navigation tree.
• In the section Additional update options uncheck the Check computer time option.

If the Cybersitter application is installed on your computer and you are having problems updating AVG, the names of the following AVG update servers need to be added to the list of allowed addresses in the Cybersitter program:

• update.avg.com
• backup.avg.cz
• akamai.avg.com

To configure the Cybersitter application please proceed as follows (version 10.0):

1. Open the CyberSitter application. 
2. Select the Tools/Support tab. 
3. Click Custom Filter Settings. 
4. Switch to the Always Allowable Sites tab. 
5. Add the abovementioned AVG update servers. 
6. Click Save. 
7. Restart your computer.

AVG updates should now proceed without issues. If the issue persists, please do not hesitate to contact AVG Customer Services as described in FAQ 2216.

Note:
If you have any issue regarding the Cybersitter configuration, please contact Cybersitter support representatives (http://www.cybersitter.com/).

If you are using a proxy server for connecting to the Internet, it is necessary to modify the configuration of the AVG update process by following these steps: 

1. Open the AVG program.
2. On the Tools menu, click Advanced settings.
3. On the the left menu, expand Update, and then click Proxy.
   From the drop-down menu located on the right hand side of this dialog select whether you want to:
   

• Use proxy
• Try connection using proxy and if it fails, connect directly

If you are using MS SteadyState, AVG may lose its updates after every restart/revert of the computer. To prevent this, you can use the script available in the Tools section of our website.