Currently I have: AMD Sempron 2660+
Nvidia GeForce 7300
1.5 GB of Ram
Windows XP home edition service pack 2

So here's my problem: I've played several games on my computer, Rome Total War, WoW, Medieval 2 Total War, Command and Conquer Zero Hour and Warcraft 3... All these games randomly freeze on my computer. THe problem is my computer SHOULD be albe to HANDLE these games, WoW was running at 61 fps and all of a sudden, without warning, without lag the computer froze.

I have no idea whats causing this and even less on how to fix it, if you could give me some advice It would be greatly appreciated.the computer only hang during games?if it's still under warranty better be QUICK, it probably having issues.
Or maybe overheated?did the fan spin?try cleaning your pc.Try updating video drivers and as mentioned by kuszmania try checking OVERALL tempreture and may be video card specifically to see if it overheats, because this could be your problem.Does it LOCK up when you do anything else?