6 Effective Solutions to Resolve the “This Copy of Windows is not Genuine” Error in 2023


In today’s technology-driven world, Windows operating systems have become an integral part of our daily lives. However, there are times when Windows users encounter an unsettling error message: “This copy of Windows is not genuine.” This error can be frustrating, but fear not, as we’ll explore six effective solutions to resolve this issue in 2023.

1. Understanding the “This Copy of Windows is not Genuine” Error

Before we delve into the solutions, it’s essential to grasp the underlying causes of this error. This error message usually appears when the operating system believes that your copy of Windows is not authentic. Some common reasons include:

  • Invalid Product Key: Entering an incorrect or invalid product key during installation.
  • Pirated or Counterfeit Windows: Using a pirated or counterfeit version of Windows.
  • Software or Hardware Changes: Major software or hardware changes can trigger this error.
  • Activation Issues: Problems with the Windows activation process.

2. Verify your Product Key

To ensure that your Windows copy is genuine, the first step is to validate your product key. Follow these steps:

  • Press the Windows key + I to open the Settings app.
  • Go to Update & Security.
  • Select Activation from the left sidebar.

If your product key is valid, Windows should automatically activate. However, if it still shows the error, proceed to the next solution.

3. Re-Activate Windows Using SLMGR Command

SLMGR (Software Licensing Management Tool) is a command-line tool in Windows that can help you resolve activation issues. Follow these steps:

  • Press Windows key + X and select “Windows PowerShell (Admin)” or “Command Prompt (Admin).”
  • In the command prompt, type slmgr.vbs /rearm and press Enter.
  • Restart your computer.

This command re-arms the Windows licensing components, which may resolve the error. If this doesn’t work, try the following solution.

4. Uninstall Recent Windows Updates

Sometimes, a recent Windows update can trigger the “This copy of Windows is not genuine” error. To uninstall these updates:

  • Open the Control Panel.
  • Go to “Programs” and then “View installed updates.”
  • Locate recent Windows updates, right-click, and select “Uninstall.”

After uninstalling the updates, restart your computer and check if the error persists.

5. Check for System File Corruption

Corrupted system files can also lead to this error. Windows has a built-in tool called System File Checker (SFC) that can help:

  • Press Windows key + X and select “Windows PowerShell (Admin)” or “Command Prompt (Admin).”
  • In the command prompt, type sfc /scannow and press Enter.
  • Wait for the scan to complete, and follow any on-screen instructions.

If SFC finds and repairs any corrupted files, restart your computer and check if the error is resolved.

6. Contact Microsoft Support

If none of the above solutions work, it may be time to contact Microsoft Support. Microsoft’s customer support team can assist you in resolving activation issues. They can verify your product key, suggest troubleshooting steps, and provide guidance tailored to your specific situation.


Q1: Can I fix this error without reinstalling Windows?

A1: Yes, you can often fix the error without reinstalling Windows by following the solutions outlined in this article. Reinstallation should be a last resort.

Q2: What should I do if I suspect I have a counterfeit Windows copy?

A2: If you believe your Windows copy is counterfeit, consider obtaining a legitimate product key from Microsoft or purchasing a genuine version of Windows.

Q3: Why do Windows updates sometimes trigger this error?

A3: Windows updates can sometimes cause compatibility issues or conflicts with the existing system files, resulting in activation problems. Uninstalling the problematic updates can resolve the issue.

Q4: Is it safe to use the SLMGR command?

A4: Yes, the SLMGR command is a legitimate tool provided by Microsoft for troubleshooting activation issues. Follow the steps as outlined in this article, and it is safe to use.

Q5: What if my PC came with Windows pre-installed?

A5: If your PC came with Windows pre-installed, it should have a valid product key. Contact the manufacturer or retailer for assistance in case of activation issues.


In conclusion, encountering the “This copy of Windows is not genuine” error can be a frustrating experience, but it is not insurmountable. By understanding the causes of the error and following these effective solutions, you can resolve this issue and continue using your Windows operating system without disruption. If all else fails, don’t hesitate to reach out to Microsoft’s customer support for personalized assistance in 2023.

Note: This article is provided for informational purposes and does not endorse or support the use of pirated or counterfeit software. Always use genuine and legally acquired software to ensure security and compliance with licensing agreements.

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