I have been having problems with my computer for the past few months. I have made no hardware changes since my problem started. I first noticed that the computer started taking a lot longer to startup then usual. And when I would click on my account name to load my person files the windows sound bite was really chopy. Ever since then every game I play, except WOW for some reason, runs VERY laggy. I became most worried when I tried play GTA:SA. When I load a file on the game the music goes into slow motion and when I play the lag stops until I start to move around and the game loads more of the scenery.

The Specs are
AMD Athlon 64 Prcessor 3400+ 2.40 GHz
2 GB Ram
Windows XP (SP2)
AGP 8X
GeForce 7800 GS OC, 256MB

Sounds like you picked up some spyware along the line. Also defrag your hard drive and run a registry repair and you should be a-okay.

I defraged both harddrives and ran three different registery repair programs and an AVG spyware scan. It fixed some registery problems but almost all my games still lag really badly.

Fool around with the settings for your video card. Usually the settings need tweeked or the settings inside the game need to be tweeked.

Try posting your question here:
https://www.askmehelpdesk.com/computers-beginners/
Some people specialize in areas such as yours. Scottgem would be a great person to ask this question.