As I have similar problems, Ill join in! After a complete format of my system partition, and clean install of WinXP (SP1), I upgraded all, installed Kerio firewall and Avast (both latest update), and bang I had worms. Avast did a boot-search and found 7 infected files. Then proceeded to windows, and yet again it fint worms. In the mean time I had not been on the network!

Worms: Win32:Raleka
Win32:Gaobot-79

I did another boot search, and this time it found 2 worms, both in a file named _restore… Also a file MSlti64.exe located in system32\ directory keep popping up, and it is infected. So I went here to find solution. Ill have a check at the technical stuff as mentioned here. But please help!

JT