Just do it the same way as the tutorial, threw gpedit.msc. Enable it, click ok or apply and restart.
Or, if you don't want to restart..right click on the task bar and click on task manager, go to the process tab, select explorer.exe and end process. Then to restart it, click file on the task manager menu bar, new task-explorer.exe-OK. And it will work after that instead of restarting the computer.