Hello and Welcome to FPCH L. :)
If you want, you can download an *.iso version of Windows XP (Service Pack 3) from here. After you have downloaded the file completely, please burn the *.iso files on an empty disc using the instructions provided here.
After you have done the above, you will have a Windows XP disc. Just insert in the disc when you get the prompt and Windows should automatically restore the required files.
Also, it might be a good idea to save the *.iso file for future reference as it might come in useful in plenty of situations. :)
Let us know how it goes. Good Luck.
-- Goku