wrote a mail to virustotal:
> Hello virustotal-team,
>
> i notice, that there are a big difference between the update cycle
> of every Antivirus scanner.
>
> I scanned a file on 01.01.2007, 15:55:57 (CET) and I see
> the scan engine last updated from 12.18.2006 (Sunbelt) till 01.01.2007
>
> The Avast Team (antivirus producer) suggested to a more detailed output
> (exactly version of the signature file like in avast 0666-1), because
> some virus scanner update more than once a day):
>
http://forum.avast.com/index.php?topic=25722.0 (posting from "DavidR")
>
> I hope you can improve your service.
>
> Thanks
Answer:
All scanners are checked for updates each 5 minutes. The Sunbelt case is
a problem we're discussing with them. The Avast one is another problem
we're trying to solve as soon as possible, and it is due some special
configuration of the update resources we use.