just bought windows xp pro

[Guest]

i already have xp pro on my machine i bought this for a friend how do i check
the key has not been used ?

 

[Gordon]

i already have xp pro on my machine i bought this for a friend how do i
check
the key has not been used ?

If you bought it from a kosher MS Reseller then you should be reasonably
confident that it hasn't. If you bought it anywhere else (like eBay for
example) then Caveat Emptor!