
Try getting AVG Antivirus, as well as ZoneAlarm to start with. Next, make a backup of your system just in case anything goes wrong.
Now get Ad-Aware, and run a smart scan and a full system scan. Next, check for viruses using AVG, and finally, download Spybot - Search and Destroy, and run that.
(For the future, you may want to download both SpywareGuard and Spyware Blaster, both highly recommended by me and PC Zone).
If none of them work, then you're better off re-formatting.
