So I picked up this 7-year old second hand computer, and I want to install Windows XP Home on it. It came with a version of Windows XP Pro with hundreds of user accounts that I did not have access to. Naturally, my first inclination was to do a fresh install of XP Home. I attempted to install XP Home, but some files did not transfer properly, and the OS would not boot after installation was complete. All of a sudden, NONE of my bootable disks are being recognized. My Ubuntu disk, XP Home disc, and XP Pro disc all throw the same error when inserted into the CD Drive upon boot: "Bootable Disc Does Not Exist", even though I have installed OSs from those EXACT same discs before...... No BIOS settings will help me