No XP-compatible partition found.

I can't install any neither XP or Vista on a computer. Even though the enitre drive consists of unpartioned space I still can't install anything. Does anyone have any ideas on what I should do? I'm trying to find a jump drive version of Fdisk (I don't have any floppy discs), so as to delete the partion, but so far no luck. Not only that but seeing as how I have a 1 TB drive that may not be the way to go.

Also, if it helps any, the reason the error occured is because I installed a new 1.5 TB drive as backup. I can't even get the OS to install on that drive either.

That's kind of the problem; without an OS I'm having a slight difficulttimein doing that. I have been using ultimate boot disc, and after gettining Fdisk to run, set a primary partion; didn't work.

Since setting a primary partion didn't work I'm thinking if I could discover a way to boot start the computer that might work. The only problem? Everything requires floppy discs. My computer doesn't have an internal floppy, and frankly, I don't think external floppy drives work as good as their internal counterparts. Does anyone know of a CD basd boot disc for XP?