DrWeb link checker doesn't find anything, but I don't think that is any guarantee although it checks the default page and any scripts on it I don't know if it would go to the extent of scanning the zip files linked.
I would have downloaded it and uploaded it to VirusTotal, but at 24MB on dial-up that isn't something I could do and there is also a 10MB upload limit at VirusTotal.
So I don't know what to suggest as Win32:Virut is a particularly virulent .exe infecter that if it get established often results in a format to completely get rid of it.
The detection would have been detected I believe by the Web Shield and that would have only given one option, abort connection, so there shouldn't be anything on your system.
The strange thing is that the Win32:Virut samples have only recently been added (months rather than years) and this patch is from June 2003 if that can be verified it may possibly be a false positive. That is the problem, verifying the patch/zip file content date and based on the fact there is no longer any official support that could be difficult, not to mention the high risk if it were correctly detected as Win32:Virut.
Hopefully one of the Alwil team will be able to check it out.