I have a Dell system that was given to me that has decent specs(p4 2.9ghz 1gig ram). I just want to set it up as a browser really. It has a ton of spyware and virus's (virii) that i can't seem to shake, so i decided to reformat. well I have no dell discs and my copy of XP pro won't work as the code on the side of the dell box won't let it. So here's my question I have an 80gb HD from a Sony Vaio thats mother board blew up. The HD works fine as I have it running as a slave in one of my other Pc's just for extra space. I never formatted it when I hooked it up as the slave in the other PC. Can I just take that HD out and slap it in the dell and be good to go. I know it has a copy of windows on it. Will it work?