Hi I am new to the forums and website for that matter. I have a problem that is driving me crazy. Our IT guy at work built me a pc about a year ago with Windows Xp (Pro) installed and for the first few months everything was fine. Then one day the damn thin started rebooting itself for no reason. I put this down to a virus or something I picked up on the net. After running numerous virus checkers and spy sweepers (all in safe mode aswell) the problem never disappeared. So I bit the bullet and formatted the hard drive and started from scratch. But this time i installed Win 98SE as I had no XP disk. The weird thing is that the PC ran perfectly with Win 98 and I was quite content..... But I picked up a good deal on ebay for a Win XP Home edition on ebay a couple of weeks ago and couldn't resist. So again I reformatted and did a fresh install of Win XP. Then the problems began again... The rebooting is totally random and I cant seem to put it down to 1 particular thing. It will reboot when downloading (usually files of 100MB+), ripping music, playing DVD's, playing games, and sometimes even just when idle. I have ran Memtest for 12 hours straight and it reported no errors whatsoever, Asus probe reports that the CPU temp is never over 55 degrees. So I have went back to Win 98SE again. But I recently Asus probe has been flashing up warnings of the +12V being too high when playin BF1942 (13.48V to be precise) could this be the cause of the constant rebooting in XP? All I know of the system specs are: Athlon 2500 (not overclocked) Asus A7v600 Motherboard 1028MB PC3200 400MHZ DDR RAM Radeon 9800SE GFX Card Do you think a new PSU will sort the problems? If so would you recommend any models?