from the doc: ' The new Microsoft XP program suite - everyone knows them, no one likes their product activation because it restricts the use of a cd-key to a single installation. This keygen computes random and virtually unique cd-keys for either Office XP Pro or Windows XP Pro, which can be used to install and *activate* these products on a unlimited number of systems - without risking to invalidate a patched version by a product update ! It says compute and not generate because it takes some time to verify, if a random cd-key can be made valid (use the benchmark mode to check how long that should take on your system). Unfortunately can not every random cd-key be made valid, so it usually needs more than one try to compute a valid cd-key (chances are aboout 1 to 40). In general it takes about five to ten minutes to come up with a usuable cd-key.'
xpkey.exe