I was given a Sony Laptop yesterday which is running on Windows 2000, so I would like to upgrade to XP. The RAM will only upgrade to 516. Is there anywhere I can purchase XP to upgrade this laptop? I don't want to buy from eBay for obvious reasons, as I might get one that needs reactivating. What I am looking for is a completely unused/unregistered copy of XP that will upgrade Windows 2000.