I would turn system restore OFF to flush out anything that might be
lurking there, reboot, do online scans in safe mode with networking and
rerun your resident anti virus.
'Course, had you Ubuntu instead of Windows, you wouldn't be having this
problem taking up time that you could otherwise devote to, of all things,
using your computer.
Check it out at
www.ubuntu.com. It's free of charge and they will even pay
the postage to send you a free CD that you can try out without even
installing it.