Maybe it would be best to run an on-line scan:

Please run the Housecall online virus scan located at:
http://housecall.trendmicro.com/housecall/start_corp.asp
Follow the prompts to scan your hard drive for viruses. Select the "Autoclean" option so that Housecall will remove any viruses from your system.
When the scan is finished, please restart your computer.

Then please run the Panda scan here:
http://www.pandasoftware.com/
Panda ActiveScan on the left .
Choose to "Disinfect automatically," and follow the prompts. Delete any viruses found, and restart your computer.

Finally, please run the WindowSecurity trojan scan here:
http://www.windowsecurity.com/trojanscan/
Remove any trojans found, and restart your computer.

Pls. let us know how it goes.