Fix “This Copy of Windows is Not Genuine” in Windows 10/8/7

If you’ve turned on your PC and instead of your gorgeous anime wallpaper (presumably), you get a black one, then this article is for you. This happens when Windows thinks that the operating system you are  using is not genuine. The black wallpaper will be accompanied with a message that says “This copy of windows is not genuine” in the bottom right corner of your screen. Also, you will not be able to personalize Windows to your liking This issue started to pop up after the Windows KB971033 update and you will run into it if your Windows license has expired or you are running a cracked version (you cheeky chipmunk).

We will look into the ways you can make this error go away if you are indeed using a legitimate copy of Windows and your issue was a false alarm. But if you are using a cracked version, we would recommend you buy a genuine license key or buy Windows 10 considering that the support for Windows 7 is running out.

Methods to Fix “This copy of Windows is Not Genuine”

If you think that Windows made a mistake, just follow these methods to get rid of it. We have made these methods as simple as possible to understand and you don’t have to be a computer sleuth. Let’s begin.

Method 1: SLMGR -REARM Command

This is a method that would work on every 32 bit most 64 bit version of  Windows 7.

  1. Open the Start menu and search for cmd.
  2. Right click on Command prompt and select Run as administrator.
  3. Give confirmation (don’t worry, it’s safe).
  4. Copy and paste the command slmgr -rearm.
  5. Confirm one more time and your system will restart.
  6. After that you will see that the “This copy of windows is not genuine” message has disappeared and you can freely personalize the PC once again.

If you are still seeing the “This copy of windows is not genuine” message then fear not, you can still try other things. The issue with this method

Method 2: Modifying SkipRearm and then SLMGR -REARM

This is to be only used if method 1 fails. Note that using Windows registry editor can make all sorts of things go wrong with your computer but if you follow the exact method, you won’t have anything to worry about.

  1. Launch the Run dialogue box by pressing Windows and R keys together.
  2. Type in regedit and press Enter.
  3. follow the directory HKEY_LOCAL_MACHINE > Software > Microsoft > WindowsNT > Current version and click on the SoftwareProtectionPlatform folder.
  4. From the list that appears on the right side, double click on SkipRearm and change the value from 0 to 1.
  5. Click OK.
  6. After this, just follow method 1.

You will see that the “This copy of windows is not genuine” message is gone.

Method 3: Deleting Slui and then SLMGR -REARM

This is another alternative to method 1. You are going to have to modify some permissions and you can watch the video by Aravind Dandotiya below for the best understanding.

  1. Go to Local Disk (C:) or the partition where the OS is installed.
  2. Under Windows you can find the System32.
  3. In System32, find slui.exe.
  4. Right click on it and select properties.
  5. In slui properties, click on the Security tab.
  6. Click Advanced and open the Other tab. Here, press Edit.
  7. Select your username and hit OK.
  8. Now select the Permissions tab and select your username. Choose Change permissions.
  9. Click on Users and then press Edit. Check Full control and click OK. Hit OK for everything until you reach slui properties.
  10. Now select TrustedInstaller and press Edit. Select System and check Full control.
  11. Hit OK for everything and then delete slui.exe.
  12. Now close everything and then follow method 1.


Method 4: Uninstalling KB971033 update

Since the whole problem started after the KB971033 update, you’d think just uninstalling it will fix the “This copy of windows is not genuine” message and you would be absolutely right. The fault with the slmgr -reamr methods is that it stops working after 30 days. You can repeat method 2  8 more times, giving you a total of 360 days. But this method should permanently fix it and we are going to show you how to do it.

  1. Open Control Panel.
  2. Select System and security. Then select Windows Update.
  3. Choose View installed updates.
  4. From the list of updates, select KB971033 update and right click on it. Click on Uninstall.
  5. Restart your Windows.

Method 5: Using RSOP

  1. Open the Run dialogue box by pressing Windows and R keys together.
  2. Enter in rsop.msc.
  3. On the left side, follow Computer Configuration> Windows Settings>Security Settings. Click on System Services.
  4. Then double click on Plug and play from the list on the right and then select Automatic.
  5. Close and then launch the Run dialogue again.
  6. Type in gpupdate /force and hit Enter.
  7. Restart your PC.

How to Prevent Copy Not Genuine Message

It’s very important that the Windows doesn’t update itself to undo everything you just did. That is why it’s recommended that you turn the Windows off. Just follow these steps.

  1. Open Control Panel.
  2. Select System and security. Now select Windows Update.
  3. Click on Turn automatic updating on or off.
  4. Select Never check for updates(Not recommended) from the drop down and click OK.

With this off, you won’t have any unpleasant surprises anymore but you will not recieve any updates in the future either.

Final Take

There you go. These are all the weapons in your arsenal that you can use to get rid of this message. You can now change the wallpaper, personalize your PC with themes and all other things you won’t be able to do without a genuine copy of Windows. If you have any other suggestions or questions, you can always use our comment section and we will get back to you as soon as possible.

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