While reinstalling my os from a disk I made the stupid mistake of leaving it off the charger. Now I can get as far as booting it from the disc drive. The windows loading screen pops up loads for a while and then blackscreebs. It won't do anything after that. The only other thing I've been able to run from the disk was a memory diagnostic. It said it was fine. But the problem persist. The computer has no os and is usless untill i get it reinstalled. Any help