go to
www.download.com, download 2 programs... one is called ad-aware and the other is "spybot search and destroy". Install both, update and run them one at a time. They will remove spyware which is probably killing your system...
Also go to
http://vil.nai.com/vil/stinger
Download and run the stinger application, it's from mcafee virusscan and is designed to seek and destroy specific virii...
good luck.