Listed below are the various option by which you can Shutdown or Restart a Windows 10 system
Windows 10 Start button
Click Windows 10 start button and select Power menu then choose Shut down or Restart
Right Click on Windows Start button
Right click on Windows Start button, navigate to Shutdown or sign out and choose the required option.
Ctrl + Alt + Del
Press Ctrl + Alt + Del and choose Power option available at the bottom right hand corner
You can also create shortcut to quickly shutdown or restart Windows 10 system. Click here for more information.