Re: laptop not acting right!!
Now this IS weird. I just fixed a HP throw away laptop that was doing the same thing.
What I did was let it sit turned off on the power pack to let the battery deep charge for 3 days. I then just tonight got it back out and it fired up in repair mode. I read over the selections and decided to just boot back in to windows. It did and I looked for my tools folder which apparently the user deleted. Got ccleaner and adwcleaner. I wanted combofix but it doesn't run on 8.1. Ran them until neither one found anything. Ccleaner found the windows.old file and got rid of it also. Since combofix wouldn't run on 8.1, I opted for McAfee's Stinger. It has a narrow search range and is a romp and stomp sort of scanner. It found nothing, but I still think there's something on there. May have to run a rootkit scan in deep search mode to find it. I could be wrong but with the client's surfing habits, I don't think so.
By this time the laptop had been running for 2 hours with out dropping out. When I got through running all my diags, it had been 5 hours.
Bottom line is when I left it plugged in for 3 days then went back to it, it fired right up. Sounds like the battery may be on the way out for the one I worked on tonight.
Another thing that go wrong on some laptops is the power jack goes bad and has to be replace. When the plug gets loose it may not be making good enough contact to get the right amount of voltage to the power distribution regulators. Worth looking in to.