http://www.unawave.de/installation/downgrade-en.html?lang=EN
this will allow the change to be made if say you installed a ultimate trial but then bought premium or professional..
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if only I'd known this 3 days ago when I reinstalled vista from win7 ultimate haha. +rep anyways.
if you want to DOWNGRADE win7 follow this
Discussion in 'Windows OS and Software' started by zfactor, Oct 10, 2009.