My Dell 5100 Inspiron quickly displays Dell screen, then goes black for over a minute, then the small white little verticles bars at bottom of screen crawl along, taking minutes before Windows XP Home starts up. I want to understand what is happening. I had recently reformated the hard drive (40GB) and reinstalled XP Home - it took 4 hours to reformat. Is it the hard drive or the PC - or the motherboard? Thanks.