How to easily fix the error “This copy of Windows is not genuine”

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Have you received the dreaded "This copy of Windows 7 (or 8) is not genuine" message? I have gotten this message a few times, none for using pirated software...  Most of the time it happens when I change hard drives out on a computer, some times happens after a virus has been cleaned off of a system.windows

 

When you search Google and find that the only way that Microsoft recommends fixing this is by finding your OEM install CD and doing a repair install?  What happens if you don't have the CD?  Why waste time waiting for a re-install to happen.  There is a much easier way to resolve this issue.

 

First find your OEM license key or the license key that you wish to install.  Your license key must be for the same version and edition that you have installed.  IE, you cannot install a Windows 7 home license key if you have Windows 7 Enterprise edition installed on your computer.  Note: this fix does not work on PC's older than Windows XP, I have not tested it on Windows XP.

 

Windows 7

 

  1. Click on the Start Button and type: CMD (into the 'Search programs and files' field in the Start Menu)
  2. The Start Menu will show 'CMD.exe' at the very top of the search results
  3. Right-click the CMD.exe file and select Run As Administrator .
  4. In the CMD window, type: slmgr.vbs -ipk <type your product key here>
  5. To activate windows after changing the key, type: slmgr.vbs -ato

 

Windows 8 and 8.1

 

  1. Right Click on the Start Button (for windows 8 in the bottom left corner of the screen) and select Command Prompt Admin
  2. In the CMD window, type: slmgr.vbs -ipk <type your product key here>
  3. To activate windows after changing the key, type: slmgr.vbs -ato

 

Reboot your computer and verify that the error message does not come up again, you are finished.

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