I just purchased parts to build a new computer, which ended up costing
me about $450 dollars. I have had a good amount of expierence working with computers and so thought that i was easily up to the task. However when i assembled the computer (A Pentium 4 2.4ghz with 512 mb of ddr 2100 ram, USB 2.0, DVD and CD-RW Drive, 30 gig and 40 gig hard drives, a 450 watt pw supply and a 64 mb ATI Radeon Video card) and installed windows xp Pro on it started randomly shutting down. Sometimes it will simply shut down, going from running normally to completely off in an instant, othertimes it will shutdown and then restart, and then other times it just freezes and there is nothing to do but pull the plug, so to speak. I have never expierenced this sort of freezing with windows xp before and the computer will shutdown or freeze every time it is used after a seeminly random ammount of time. The CPU usually is running at about 45 degrees celsius and never higher than 50. If anyone could help i would be so very grateful.