How to hide the taskbar in Windows 10 when in Full Screen

1. One cause for the taskbar to not auto-hide is maybe due to a glitch in the software. Check for an update to your Windows 10 OS, and install the same.
2. To do that, open the Windows 10 Settings by pressing the Windows Key + I on the keyboard. In the Settings window, click on the Update and Security option.
   
   
3. Click on the Check for Updates button to manually check for pending updates.
   
   
4. Install the updates immediately and reboot the computer.
5. Check if the issue has been resolved.

Method 2 – Enable the Autohide Taskbar