Hello wadewest, Welcome to BC.
With out your Windows XP Home install disk we can not even do a repair, which is what I would suggest. I will leave you a link for how to do a system repair, please print this article so you have a reference.
How to Perform a Windows XP Repair Install = http://www.michaelstevenstech.com/XPrepairinstall.htm
Suggestion, borrow a install cd from a friend and you have to have the key for this OS you have installed that should be on a sticker that should be located on your computer somewhere. Also this repair will not work correctly if you have Service Pack 2 installed. If you have Service Pack 2 installed make sure you get a cd for Windows XP Home with Service Pack 2 already on it.