If while installing updates or files from the Microsoft Download Center, your validation for your Genuine Windows 7 fails and you may receive a message – This copy of Windows is not Genuine, then this post may interest you.
Windows Validation fails with errors
The message may also be accompanied with validation error codes: 1699978131, 1571607440, 757834664 or 228668481!
The Non-genuine warnings occur when Multilingual User Interface packs are installed on incorrect editions of Windows 7!
Specifically, this issue could occur when you try to install Multilingual User Interface (MUI) packs on Windows 7 Starter, Home Basic, Home Premium, or Professional edition.
Multilingual User Interface (MUI) packs require a license to be used and are available only for Windows 7 Ultimate and Windows 7 Enterprise editions.
If these language files are present on another edition of Windows 7, genuine technologies will detect tampering on the system and display the non-genuine warnings.
To resolve this issue you will have to remove the MUIs or reinstall Windows 7.
My Windows 7 PC has been working fine, but only recently the ‘Windows not genuine’ message has started appearing. I have not installed ‘Multilingual User Interface’, nor I have been updating my windows for several months now. I have also tried your methods of ‘Rebuilding the Tokens.dat’ and ‘Reinitialize the license files (slmgr rilc)’. Still I am facing the problem. What should I do?