Posted May 21, 201410 yr When Win 8 came out I purchased 3 licenses from the MS retail store and one retail OEM from Newegg, at the time I installed it on one computer which is working great, but chose not to install the other 3. Last week I decided to build a new system and installed win 8 Pro hover when I try to activate using any one of the remaining licenses I get Error code: 0xC004C003 specifying that product key is blocked. What can I do to be able to use these keys. Continue reading...
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