I have a HP Pavilion 531w , it will be 2 years old in July. Lately, I\nhave started having a strange problem and I don't know what troubleshooting\nshould be done to find the problem and correct it.\nI can be in the middle of anything and it just shuts down. I don't have it\nset to go into hibernation or anything like that. Just can't figure out what\nthe problem is. Wnem I try to restart my PC there's nothing. So I unplug it\nfrom the wall and from my PC, then plug it back in and it's fine. Any\nsuggestions?