Some free online anti virus tools

Better do the scan under safe mode.

http://housecall.antivirus.com

http://www.pcpitstop.com/antivirus/default.asp

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

Also try these free programs to rid your system of spyware, trojans, and other malware:

http://www.superantispyware.com/
SuperAntiSpyware

http://www.download.com/Malwarebytes-Anti-Malware/3000-8022_4-0804572.html?tag=nl.e415
Malwarebytes' Anti-Malware 1.30