I have an HP Pavilion s7700y Slimline. It has Windows Vista on it, which I want to remove and replace with XP. So far, I have backed up all of its hard drive onto an external HD. Booted to an XP OS disk and selected to "Repair" any existing installations of Windows. To which, when brought to the C:\ prompt, I typed "Fixboot C:" With that, I got that the command wasn't recognized or that C: was a removable drive. The same when I typed "Fixmbr C:". I then booted it to a bootable disk and typed "Format C:" and didn't get the desired results there either. I wasn't allowed to load XP over Vista either. Can't format the C: (where Vista resides) while operating inside of Vista. Fdisk didn't work. How can I get that crazy operating system off my computer so I can put something that makes sense on there? Definitely appreciate any help you can offer me on this one.