Good point Broni...
However he did return a non-working machine to her which makes me wonder about his level of expertise...
spacedout if you think you can do this yourself a
Repair Install of XP will save all your data and programs...
You will need an official Windows XP CD that matches your version and service packs installed.
In other words if you are running XP Pro with SP2 that is the CD you need...an OEM CD ( Dell, HP, Compaq etc.) will not work for this.
Borrowing someones CD to do this is well within your rights according to MS so there's no worries there.
Let us know after reading up on it if this is the way you want to go...