The system that I am working on is really slow, slow to boot up, slow to run, typical symptoms of spyware/malware/viruses. I have tried scanning with AVAST (latest updates) and it found nothing, Counterspy found 44 files that were remnants of weather bug, but that was it (removed them). Ad-aware found a dialer, which was removed. The system still running very slow.

Ran a scan of the hard drive with Seatools and it passed.

What do you guys suggest? The person does not want to do a format and reinstall of the OS, as he has programs on there that he lost the disks to.

System restore?