http://www.pandasoftware.com/activescan/

Use that FREE online virus scanner. It's the best I've ever used, and I use it weekly. It picks up on almost every new virus out there, has a heuristic scanner (finds unknown viruses by pattern), and it is updated constantly.

But, before you scan, no matter what you use, disable System Restore, and enter safe mode, so all the backups, and system files are scanned.

Cheers

A_T