Well my computer is currently running Windows Vista Home Premium and I really want to go back to XP Professional. I have the disk and the key for it but when I click on the "Install Windows XP" icon its says: "This program has been blocked due to compatibility issues." i read a little further.... then it says that I cannot complete this installation because the current OS I am running is newer than the one I am trying to install. How can I get around this message? Would creating a partition on the C drive work? Any help is appreciated.