Hey guys, Im having a major problem with my computer. When im on my computer or even away from it, it will randomly shutdown and restart. Sometimes it will boot all the way to the desktop with no problem, other times it will start booting up and restart when it starts to load windows xp, and it will continue to boot and restart till i come home and shut it down. And theres other times while its booting up, that it will do a "check disk scan" to make sure that system files are in the correct index's and it will find something wrong and delete the system files and never replace them when finished, so when it goes to reboot, half the system files are missing and i have to reformat and reinstall windows xp to correct the issue (which Ive reformatted and reinstalled windows xp 9 times because of this) And other times it will not mess with the system files but attack my programs and its even deleted the themes to windows xp. Ive disabled all external stuff on my computer that was not needed thinking maybe something external was causing the issue, but the problem still persisted. Ive used programs to test the Ram & hard drive thinking maybe something was wrong there, but they both tested successful. I have programs watching the Temperature & voltage of the CPU, but the CPU seems to be working fine. Ive even called Microsoft and talked with there technical support guys about 7 times, and they still haven't been able to give me a actual answer to my problem. Im running out of idea's here guys and i need some help. I made the computer myself and heres the specs: P5k-E Asus Motherboard 2 x 1Gb DDR2 1066mhz Kingston 140GB Western Digital Hard drive Intel Core 2 Duo 2.66Ghz Radeon 512Mb Graphic Card Windows Xp Home W/ Service Pack 2 (but i did have service pack 3, but it gets really annoying after u have to reinstall it every time you reinstall XP) Hope you guys can help me.