how to remove This copy of windows is not the genuine error from windows seven

This copy of windows is not the Genuine error is the common error. that appears when we used the window that is not genuine. this error starts displaying after 90 days. it's mean our window is expired and we need to activate our window.
there are two ways to remove this copy of windows is not the genuine error. the first way is entering the command. and also you can find some software on the internet that can remove this error.
follow the bellow steps. to remove this copy of windows is not the genuine error by using the command.

Remove this copy of windows is not the genuine error from windows seven.

1. go to the start menu and type cmd in the search box.
2. right click on the CMD and open it as Administrator. 
   
3. after opening the command window. enter SLMGR-REARM and press the enter button. 
   
4. restart your computer. this copy of windows is not the genuine error is removed.