“Windows 7 Build 7601 This copy of windows not genuine” How do I fix this?

Problem: I bought my copy of Windows 7 Ultimate from eBay. After installing updates I received this error:  “Windows 7 Build 7601 This copy of windows not genuine” How do I fix this?


1. Download and run the Genuine Diagnostics tool (MGADiag.exe)

2. Open MGADiag.exe and click “Continue”, after a few moments click “Copy”

3. Contact Microsoft Support Center (http://support.microsoft.com/select/Default.aspx?target=assistance) for help with your Windows product. Paste the report on your message.

Here are two possibilities: you have a genuine copy of Windows or you are a victim of a ripoff.

If you have a genuine copy you may have some problems with your Windows configuration. There can be a lack of permissions in the registry key HKU\S-1-5-20 or you have some missing registry keys. In both cases follow the instruction from the Support Center.

There is a big possibility for you to be a victim of a ripoff. In this case you need a new copy of Windows and ask for a refund from eBay. It’s recommended to buy Windows from Microsoft Store: http://store.microsoft.com/microsoft/Windows-Windows-7/category/102

In this video bellow you can find some tips about how to distinguish an original copy of a counterfeit product. It’s also an example of how good some ripoffs are made.


  • http://support.microsoft.com/
  • http://answers.microsoft.com/


  1. I have purchased genuine Windows 7 and installed 64 bit in my Desktop PC. The same was registered with Microsoft Office and system indicated genuine logo when I clicked properties and all the updates were being downloaded regularly for about a year. But suddenly it is now showing “check genuine” I had run genuine check but it gets hanged. I have also got Windows product ID. How to restore. Thanks, Vaidyanathan. e-mail:

  2. I think is important to have your Windows installation Activated (right click on “Computer” and choose Properties to check that).

    Is there any other problems or other Microsoft services that encounter problems related to your Windows Activation (like updates, other Microsoft products)?

    If you install or download the Genuine Tool Check from microsoft.com, you can try to run in as Administrator (right click and “Run as administrator”.) to avoid any permission/access problems with that tool.

    Let me know if you need further help!

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