Wednesday, August 20, 2025

Fix “This Copy of Windows is Not Genuine” Error in Windows 7

 





"This copy of Windows is not genuine"

Don’t panic — it’s a common issue in Windows 7. It can happen even on legitimately activated systems due to Windows Updates or system changes. Here's how to fix it step-by-step.

Common Causes

  • Windows Update KB971033 causes revalidation

  • Your license key is blocked or blacklisted

  • Corrupt licensing or activation files

  • System files changed or damaged

Step-by-Step Fixes

Solution 1: Uninstall Update KB971033

  1. Go to Control Panel > Programs > Programs and Features

  2. Click View installed updates

  3. Find KB971033

  4. Right-click and Uninstall

  5. Restart your PC

Solution 2: Reactivate Windows via Command Line

  1. Click Start, type cmd

  2. Right-click Command Prompt, choose Run as administrator

  3. Type the following command and press Enter:

    slmgr -rearm

  4. You’ll see a success message

  5. Restart your PC

This resets the activation timer and may resolve the issue.

Solution 3: Enter Your Product Key Again

  1. Right-click Computer > Properties

  2. Scroll down and click Change product key

  3. Enter your genuine product key

  4. Follow the activation wizard steps

Solution 4: Activate by Phone (If Online Fails)

  1. Click Start > Run, type:

    slui 4

  2. Choose your country/region

  3. Call the Microsoft number displayed

  4. Enter the installation ID

  5. Get and enter the confirmation ID from Microsoft

Solution 5: Use System Restore (If Error Just Started)

  1. Go to Start > Control Panel > Recovery

  2. Click Open System Restore

  3. Choose a restore point before the error appeared

  4. Let Windows restore and reboot

Extra Tips

  • Don’t use cracks or illegal activators — they’re risky and can cause more issues.

  • Always use a genuine product key if you're reinstalling Windows.

  • Back up your system before making activation changes.

How to Check if Activation Worked

After fixing, check activation status:

  1. Press Windows + R, type cmd, press Enter

  2. Type:

    slmgr /xpr

  3. You should see: "This machine is permanently activated"