Windows XP is nearing 2 decades old, and even Microsoft stopped supporting it years ago...you can't expect a new miner in 2017 to support it, I have no way of testing it even if I wanted to (which I don't...I hate windows ).

Like others have said, install Ubuntu on the old hardware, its one of the easiest to use linux distro's  (has a modern GUI). All you have to do is just download the linux binary after you install it and it should work out of the box.