Computer Restarts

[warriorlax21]

I just built my computer and its been running good after i installed world of warcraft. I have a althon 64 cpu, asus a8v mobo, sATA maxtor 200gb hd, ATI 9600 Pro Video card, and a 420 w power supply. I would start up my computer and i would let it go like i can go on aim and not have any problems i can play guild wars with out this problem. but if im on world of warcraft i would play and like 2 mins later it will restart my computer. It doesnt just happen when im playing that game it happens sometimes when im not playing the game.

[Dark Nova]

-ok first check the ram, do a memory test at memtest.org
-after if it still restarts, go in safe mode to try if it restarts there
then if it still dosent work report back here

[jayb1234]

Check to be sure the CPU heatsink is securely mounted.

[Panama Red]

First thing I would suggest is turning off the Auto Restart feature so it will Blue Screen when it faults. Post back with the error message on the screen and it will point us in the right direction.

Press the Windows button and the Pause Break button at the same time to bring up System Properties>Advanced tab>Settings button under Startup and Recovery>uncheck Automatically Restart

[warriorlax21]

i did change my restart thing but it still comes just restarts. its weird, and anoying. it takes like 20 mins to do it when im playing the game. i didnt try memtest. but i will which one should i download

[Panama Red]

What brand is that 420 watt psu?