The new box is running Windows XP Professional Pirated corporate edition which I installed for a test a week back.... The old Pentium 4 box is running XP Home, legit.
Today I bought another stuffed computer in a very nice case with the all-important XP Pro Licence on it (mainly for the licence, the case was just a bonus!) How do I put in that valid serial number to make it legit? I tried the usual method but it did not accept it.