I have tried everything to rid my HD of windows 7. I installed my brothers copy on a new build of mine to run some tests and make sure the system was running okay. I did not think that I would have an issue installing windows XP. When I load XP from disc I keep getting an error telling me that I need a real copy of Windows XP. I have a authentic version, I have installed it many times before. I have read that downgrading from Windows 7 can be difficult. Are there any solutions I can try? I have already try installing in on a different partition. Same error. I have tried using the windows 7 install CD to remove windows 7. No luck. I even entered safemode in an attempt to delete WINDOWS and the system told me that they could not find WINDOWS. Any help??