Many were defective. I'd get the maker to swap that out.
i bought a new PC not long ago every thing was fine until about a month ago when it started randomly turning off like someone was pulling the plug. i noticed strange things like the mouse light was still on after it crashed, i dont think its a virus because i have reinstalled windows 7 since the problem began.
also ive checked the temps with both the BIOS and a third party software and there all fine.my thoughts was that it is a faulty PSU but im not sure, any thoughts on what the problem could be?