Just recently my HD with 7 on it quit booting up and I would like to install XP Pro on it instead. When I boot off of the XP Pro disk the installation initializes and I select the C:/ partition (My only partition) to install the OS onto. When I do this, I get the "Your computer's startup program cannot gain access to the disk containing the partition etc." error. I would like to overwrite the 7 OS, but also retain the rest of my data. Is there a feasible way to do this?