I have vista 64 bit on my home computer. I wanted to reinstall xp pro but when i try it won't let me run it. I first formatted another hard drive and then cloned my notebook xp pro (using a 3.5hard drive enclosure) and switched the hard drives. It shows windows emblem and tries to run but then it says windows had an error and was improperly started. It tries to start again but goes back to the windows was improperly started and opts to start in safe mode which i tried but it goes back to the windows was inmproperly started screen. I was told it might be a serious trojan virus but yet have had anyone offer any solutions to fix it. Well any suggestions?