I have upgraded my clients business computers from Windows 8 Pro x64 VL to 8.1 Pro x64 VL using an ISO downloaded directly from MS volume license site. The upgrades all went fine. However the systems are now in a NOT activated state. We have tried the
activation using the original VL MAK key provided with the purchase of Win 8 Pro x64. The message we get is "The key did not work. Please check it and try again or try a different key.
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