From Repair Mobile

New motherboard without repair install of windows

Windows will try to re-activate after changing a certain number of system componants. Change one or two inconsequential(sp?) parts and no big deal (drives or memeory or proc), but change one or two major componants (mobo alone will cause a re-activation) and windows needs to re-ativate. I More details [1] - thanks to thebestcasescenario.com