I have just replaced the cpu and motherboard on my system with an Athlon64 3500 (939) and an Asus A8V Deluxe mobo. The system boots fine. I am attempting a clean install with Windows XP-SP2 and continue to get the following error message: The file *.* (happens to numerous files during the copy process) was not copied correctly. The file Setup placed on your hard drive is not a valid Windows XP system image. If you are installing from a CD, there may be a problem with the Windows XP CD. I am using IDE hard drives, not SATA. Everything else is the same as the previous system. In an attempt to diagnose, I have done the following: - tried different hard drives - tried different cd drives - tired different install cd's (that I have successfully used before) I continue to get the errors, so is the problem related to the Athlon64 compatability? Is it possibly the bios needing updating? Is there a problem installing a 32 bit version of Windows with a 64 bit cpu?