To resolve this problem, follow these Steps
Change the product key to an MAK
To change the product key to an MAK, follow these steps:
1. Open an elevated command prompt. To do this, use one of the following methods, as appropriate for your OS.
Windows 7 or Vista (Windows Server 2003)
Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as…
How to Fix Windows Activation error 0x8007007b?
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