I recently discovered new problem when i playing a 3D game in Windows 7. That is Automatic screen rotation from Landscape to portrait & PC screen resolution change from 1366 x 768 to 800 x 600.

I tried to get Task manager using Ctrl+Alt+Del. After i quit that game nothing changed.
I am also tried to restart my system. Button the problem not solved.

First you need to change your computer orientation from rotation to normal. That mean portrait to normal. So right click in Desktop and choose Screen resolution. Change orientation from portrait to landscape, also change screen resolution.

If you want to permanently avoid this problem?

Graphics and media control panel
Turn of Hot key functionality.

Right click anywhere on your Desktop screen and select graphics options. Find hotkey and choose disable.