When I shutdown my desktop computer and then start it I have no mouse. If I select Enter on my keyboard I can get to the login screen. Then I tab over to the Power icon and select it with the Enter key. I use the arrow keys to move up to Sleep and select Sleep with my Enter key. The computer goes to sleep. I can wake it with my mouse and from then on my mouse works normally. In other words starting the computer after it sleeps allows the mouse to work. Starting it after a Shutdown or Restart leaves the computer without a mouse pointer.