My laptop change its screen display from horizontzl to vrtical position suddenly. How can I restore to its normal position? Thanks.

Try these in sequence:

1 You might have a shortcut key enabled for this ctrl-alt-up/left/right arrow but this will only work if your display driver set it up.

2 On the Desktop, right-click, Graphics options, Rotation - this will only be there if your display driver has put it there.

3 Go to Control panel, Display, Change display settings, Advanced settings, {choose the big tab that has the name of the display driver maker on it}, Graphics Options {or similar term} - then delve around to find the controls - these are all laid out differently so I cannot suggest which bit it's going to be in but rotation controls will be in there somewhere.

4 When you find the rotation controls, have a look for keyboard shortcuts in the same area of the display driver settings - if you never need to rotate your display then you can normally disable any keyboard shortcuts to avoid accidentally hitting them whilst you are trying to do something else [which is probably what caused your current problem].

My laptop change its screen display from horizontzl to vrtical position suddenly. How can I restore to its normal position? Thanks.