1- Go task manager (Ctr+Shft+Esc) in processes tab and highlight explorer.exe then click the end process button.
2- Click file and make new task.
3- Type explorer.exe and press enter to make a new task for your display.
4- Click windows icon and x at the same time and select command prompt as admin.
5- Type “slmgr -rearm” and press enter.
6- That is it! Restart computer and the error will not come up any more.