Comodo 4.1.150349.920

I already intalled this comodo internet security about a week ago. Until today I cannot update the antivirus. The update always failed after downloading 40% of the update. Is there any solution for my problem?

I can’t find it at the moment, but I think you can download the definition file on it’s own, and update manually.

You can download the complete database from the bottom of this page:

Then follow the steps from this page to replace it:

Hopefully this solves your problem and you’ll be able to update normally from now on.

I’ve done the manual update, but the antivirus status is never updated and every time I connect internet, it always automatically update and failed after downloading about 84 Mb of the update. Is there any way to turn off automatic update?

Yes, go to Antivirus / Real Time Scanning. There should be an option to 'Automatically update virus database before scanning.

If you disable this option I don’t think Comodo Antivirus will update automatically.