*TUTORIAL* - Please read if your having Antivirus update issues! [FIXED]


Last Updated: 18th, December, 2008 Australian Eastern Standard Time.

AntiVirus Update Tutorial For Users having Update Issues In The Latest CIS version

Hi Guys.

First, Before you try this, Make sure…

  • You do NOT have any other Anti-Virus running real time!
  • You’re Firewall is NOT blocking any part of the Anti-Virus, Please give CIS full access rights.
  • You do NOT Import ANY kind of Configuration in Comodo Internet Security/AntiVirus. This needs to be done in on a clean machine, With rules built from scratch.
  • any other possible security software is not conflicting
  • Vista users, Turn of UAC (User Account Control) And if you have Comodo Firewall or any other Firewall, turn of Windows Firewall. These things can interfere with the Registry Changes needed to be made on Windows Vista OS.

Make sure your logged in as Administrator. After searching the forum, I found a possible solution to help you guys get the latest updates. Ever since Comodo Internet Security 3.5 RC2 was out, It had different update paths and registry keys compared to CIS now. 2 things were changed:

  1. Path to Antivirus updates was changed.
  2. Released updates were not compatible with RC2

First, Please download and install Revo Uninstaller. Uninstall Comodo Internet Security using this program, and reboot, Do not Export your old configuration, This needs to be a completely fresh install to make sure the updates work.

Next, download, install and run Comodo Registry Cleaner. Remove any left over registry entries found, (Do not clean “unsafe entries” they are for Advanced users and may be unsafe to delete) and reboot.

Optional: It’s worth searching for and deleting comodo, “internet security”, cmdagent, cmdguard, cmdhlp, guard32 in the Registry (See picture) if these things were not deleted by Revo or CRC, if all was deleted then great! You don’t need to do anything else. But do a search just in case.

Now go to Comodo Internet Security website, to download the latest .439 build selecting whether you’re Operating System is 32 or 64 bit. Download and install CIS, and off course reboot.

Finally, now this is an important step. Close Comodo Internet Security by right clicking the CIS system tray icon and choosing “Exit”, confirm the exit by clicking “yes”. Now, Go to Start>Run> type regedit to open the Registry Editor. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations\0\AV\Settings

This is what the old registry key looks like when a person export an RC2 Configuration, or still has that old key on there system after a uninstall, etc… So therefore, updates do fail.

OLD Config


This is what it should look like so AV updates do work:

NEW Config


Anyway, bottom like is:
UpdatePath has to be av/updates
UpdateURL has to be [b]http://download.comodo.com/[/b]

The following Registry keys also have to be checked & changed:
[HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations\0\AV\Settings]

[HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations\1\AV\Settings]

[HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations\2\AV\Settings]

[HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations\3\AV\Settings]

2 Things to remember when importing stuff here.

If you import AS under a new different policy name you will end up having a [HKEY_LOCAL_MACHINE\SYSTEM\Software\Comodo\Firewall Pro\Configurations[b]4[/b] profile, so you have to check that also.

If you want to change registry settings for CIS make sure you close it before changing otherwise the changes will be overwritten when rebooting or shutting down your PC/CIS.

Reboot one more time to make sure the Registry Changes take effect. Remember to not import any configuration, leave CIS alone until ALL this is done. Now try checking for updates (and making sure you have no conflicting security software installed). Please also check the Firewall and make sure it does not block cmdagent.exe or TCP connections via 80 port, And Internet Explorer doesn’t have any “fancy” proxy stuff going on.

This info was gathered from posts on the forums. Please follow all steps carefully, and make sure your Internet is off course on!

End Tutorial.


UPDATED! 17th, December: There was a recent Anti-Virus update that asks you to restart your PC to fix this AV Update issue. When you get this prompt, restart your PC and your virus database version should be 771. Updates should now work fine, This tutorial will be kept for a little while longer.

Still having AV Update issues?

If you’re still having AV update issues, post full system details here as developers are still working hard to figure out the issue, As not everyone has this problem (including my self). Be sure to include:

1 - Exact operating system version: e.g. Windows Vista Home SP1 32 Bit
2 - Do you use this computer with other users? Do you have other user accounts that are created?
3 - Have you ever changed internet explorer proxy settings?
4 - Can you please tell us the exact list of security software you have installed? E.g. XXX AntiSpyware 4.3.1


Thread Closed since this issue has been fixed in a recent definition update.