So you expected a fully legit copy of XP Pro for £48 (plus his time to install it).

Lets face it, he's done you a favour as XP Pro is miles better than XP Home, and who doesn't have a burned copy of XP??? Ys, its illegal, and yes he shouldn't be doing it as a "business", but still....you got some value for money I say!.

Windows Update site will check the key and see its been used lots of times, so you can't download from there. Turn on automatic updates however and they don't check the license key, and will update fine

£48 you got a bargain mate. If your really that disgusted by having a copied version of XP Pro then format it and install XP Home again from your CD (assuming its OK, no scratches and you have the key).

Just my thoughts!