unable to find cursor on screen

Press Ctrl - Alt- Del together. The blue menu screen will appear with Cancel highlighted. Press the Tab key 4 times until it goes to the Power icon on the bottom right of the screen.

Sometimes it may hightlight Lock, etc. above before going back down to Cancel. No problem just keep tapping the Tab key until you get to Power.

Press Enter and a menu will appear showing Shutdown and Restart. Use you keyboard arrow keys to Restart. Press Enter and your compur will reboot/restart.

Do you have your cursor back?