Recently, I've installed Windows XP to replace Windows 2000 a couple of months ago. Since then, whenever I play games or use applications that use up a good amount of the graphic card and the computer, at random times, the computer will either restart, lockup, or display a blue screen which I can't get out of that says something like this: "An error has occured...". Sometimes it'll do this a couple of minutes after I start up the game or application, other times I'll be able to use the game or application for up to an hour without any problems.
Also, before I installed Windows XP, I had to take out my 20 GB hard drive to move the files over to another computer so they wouldn't get lost and then I reinstalled the hard drive into the computer.
Also, I use Norton AntiVirus.
My system specs are:
Windows XP Proffesional
Intel
Pentium 4 CPU 1500 MHZ
1.50 GHz, 1.50 GB of RAM
Geforce FX 5700
2 hard drives, 20 GB and 80 GB
Please help if you can. Thanks.