I upgraded my older, XP machine to Win 8 Pro. I did the on-line upgrade and all went well.
Turns out it was a 32 bit install, even though the PC was 64 bit capable. (I understand now this is due to upgrading from XP)
Yesterday I received my back up DVDs and decided to upgrade from the 32 bit version to the 64 bit version...
But nothing I've tried has worked.
Machine is an AMD Athlon 64...
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