I found the answer here and used it successfully. My wife did the same thing on her XP netbook this evening. I will strongly suggest you to contact a computer technician to fix this issue. If none of the above solutions has solved your problem, this might be due to a bad configuration of your graphic card. Press CTRL+ALT Gr+Up/Down/Left/Right arrows You can also make use of the hotkeys to change the rotation of your screen Step 4: Select the “Rotate” option and change it to 0 degrees or to the “normal” mode.Step 3: From the displayed list, choose the name corresponding to your graphic card model.Step 2: Select the “Parameters” tab and click the “Advanced” option.Step 1: With the Desktop screen displayed in front of you, use your mouse’s left-click to access the “Properties” option.Step 3: Uncheck the box labeled “Enable Rotation”.Step 1: With the Desktop screen displayed in front of you, use your mouse’s left-click to access the “Graphic Properties” option.This problem can be easily fixed if you follow the steps below: If you are facing a 90/180 degrees rotation issue with your displayed screen, this can be either due to a problem with your graphic card or a wrong manipulation of the hot keys of your keyboard.
