Problem

Earlier I also faced this problem, fix the issue by following simple steps of the computer keeps restarting.

Apply troubleshooting in Safe Mode

Click - Windows Start icon - Press and hold the left Shift key - Click Power icon - select Restart
keep holding the Shift key.

Lastly release the Shift key then system begins to restart.

The system will restart in the safe mode.

Disable the Automatically Restart Feature

windows search box - open Control Panel - Select System and Security option - Click on the System option.

At left pane - choose Advanced System Settings - next window - under Startup and Recovery - click Settings - Under System Failure,
select uncheck the Automatically disable option - Click OK - exit