I received a call from my friend today morning and he said "display of my monitor is upside down". All the application windows on his monitor were upside down. Accidentally he change few display settings which caused this problem.
When you also encounter such problem, here are the simple steps which you need to follow to restore normal display
- Locate the system tray (display area next to time on task bar) icon "Inter Graphics Media Accelerator Driver"
- Right click on the icon and choose the option Graphics Options-->Rotation-->Normal