One of our favorite ways to restart File Explorer is to use Task Manager.
Press Ctrl + Alt + Delete or Ctrl + Shift + Esc and click Task Manager. Right-click on Windows Explorer and click Restart. If you don't see Windows Explorer, click on More details.
If your taskbar disappears, press the Windows logo key on your keyboard.
2: Right-Click Not Working on Taskbar or Start Menu - PowerShell Repair
After restarting File Explorer, most people have had success with these PowerShell commands.
3: Right-Click Not Working on Taskbar or Start Menu - Check Windows Updates
Because this problem has appeared after a Windows Update, see if there's a fix by going to Start > Settings > Update & security.
Click on check for updates.
4: Right-Click Not Working on Taskbar or Start Menu - Add Registry Key
While every tutorial on the internet recommends you add a new registry key, we advise against it. The first three steps should solve your problem.
Advanced users can go to HKEY_LOCAL_MACHINE\SOFTWARE\MicrosoftWindowsCurrentVersion ImmersiveShellLauncher and add a new DWORD named UseExperience with a Value_data of 0.