A fairly common but disturbing feature of some laptops is that by using a combination of keys the desktop can be rotated 90 or 180 degrees so that it displays “on it’s side” or “upside down”. This has just happened to one of my clients who’s young son had been playing with the laptop.
The cure can be very easy..
Hold down the CTRL and ALT keys and press the up or down arrow key until the display has turned the correct way around. Of course some more devious readers may use the same combination to play tricks on other laptop users. Shame on you !