my pc keeps on restarting on me. this problem has been there for a few weeks now. i took it to a techie but he can’t figure out what the problem is. my system would automatically restart without any warning especially when i am playing world of warcraft. then at times it would simply keep on restarting for a few times when the bios r loading. i tried to reinstall the OS but the system booted again when the bootable cd was running. i have tried changing the RAM, cleaning the pc for dust and checking CPU, GPU and RAM temperatures. nothing ads up. any help would be of greatly appreciated.