I have a 3 yr old laptop(dell vostro 1500???) that I use for news feeds, emails, general surfing, etc. It's been getting slow lately, so I finally decided to reinstall windows, and during the formatting part of the reinstallation process, it keeps shutting down......what's the problem here? mobo? hard drive? it always shuts down when the formatting reaches around 20-27%.........thx guys