Hi everyone! Yesterday i was using my pc like everyday when suddenly it turned off, just like if you unplug it. Now the pc starts but can't enter to windows, it keeps restarting at the windows logo. I've formatted my hard drive but i can't install win7 because it keeps restarting and random points of the installation. I've used "chkdsk" command and the hd is fine, checked the memory and is fine... I dont know what else to do! Can somebody please help me? Ty a lot!