I have a Dell Dimensions 4100 desk top. It was delivered with Windows ME. I have reformatted the HD and when I attempt to install XP I get an “invalid system disc ” error. The only OS that the system will accept is ME. Is there something in the BIOS or some where els on the computer that won’t allow XP to be loaded? Any help would be a great. I am tired of living in the 90’s Thanks Geoff