The main reason of error “This copy of windows is not genuine” is that you are using a pirated copy of windows instead of original. We have to face many issues when this error occurs, like we are unable to change wallpaper of our desktop. If we change the wallpapers, it removes itself after sometime. The window of desktop becomes black and many other problems we have to face.

There are many ways to solve and fix this error or problem. In this post, we will discuss only the easiest way to overcome this issue. We will use CMD commands to fix “This copy of windows is not genuine”.

The command we are going to use is called the SLMGR -REARM Command.

Let’s see how to use this command step by step with images of screenshots of desktop to make it easy :

• Type CMD in the Start Menu.

• Right Click on CMD and Click on “Run as administrator”.

• Type SLMGR -REARM (There is a space after SLMGR) and press Enter.

• After pressing enter there with will a confirmation message, Click “OK”.

After completing all the steps, close all the windows and restart the computer. Now you will see the message “This copy of windows is not genuine” disappeared and the issue resolved or fixed.