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This is in the lower left corner of the screen. You can also hit the ⊞ Win key to open this menu without a mouse. You can also open this menu without a mouse by hitting the → Right Arrow key twice, then ↵ Enter. Your computer will reboot normally.  You can hit R while the menu is open to select this option without a mouse. If there are processes running that are preventing Windows for rebooting, click Restart Anyway.
Click the Start. Click the > to the right of Shut Down. Click Restart.