Problem with genetic temp files

Hi...I have problem with my computer.When I'm online,files are created by some kind of virus in my temp folder:

C:\Documents and Settings\Shone\Local Settings\Temp

Files are:BIT1E.tmp,BIT2CB.tmp,BIT4A9.tmp...

I delete them with Ace Utilities but they always return...

I also have TuneUp Utilities 2007 and RegistryBooster 2 and it can't fix them.

Also,I have NOD 32,Spybot S&D,Ad-Aware,SuperAntiSpyware Professional and Comodo firewall and they don't see anything.

I Went into Safe mode with command prompt and deleted files from that folder because Killbox couldn't delete them but they returned again.

Can U help me and tell me what to do? Thx...