A lot of smart-ass answers could be given right about now, but I spare you.
Ilona Bankuty said:
My computer screen is upside down, how can i turn it back ito original position? tx
You need to tell us the make and model of the monitor as well as the video card make and model in the computer.
My money is betting on the monitor, without even learning what it is. Maybe there's a few buttons in front of the monitor? Push them and see if any offer to rotate the display. It may say something else like "orientation."