Read through the tutorial at the link that follows...if you have any questions, ask before you start. This procedure normally takes about an hour to run...you may need the product key, so if you don't have that handy (it may be on the machine somewhere on a sticker) let me know and we'll pull it out of the registry before we start.
REPAIR your installation of XP. This procedure will not damage or change your current files or settings...it will just repair or replace damaged system files. You will be asked for your Installation CD and may be asked for your product key. Follow the instructions carefully...print them out if you can. Note: This option is not always available on OEM Recovery Cd's
Once this repair has completed, you will have to download all Windows Updates again.
What do you think...you game?