Your computer will immediately shut down. The /t 0 part simply removes the ... you can press Ctrl + Command + Option + Power ...

You can also use the Run Command box to create a sleep timer shutdown for your Windows 11/10 computer ... Click on the Start, go to the power button in the bottom right corner, select Sleep ...

By default, it shows a Shut down anyway button that allows users to shut down the computer without closing those apps. Since you will change values in Registry Editor, it is better to back up ...