Rotate Desktop of Computer Screen

This has nothing to do with your monitor settings as suggested above, it is a windows setting!!!

Right Click on a blank piece of your desktop, in that menu select "Graphics Options" > "Graphics Properties.

That will open a Pop-up Menu, you'll need the 5th tab which says "Rotation" and select the option you want from there.

You can alos try holding down <CTRL> + <ALT> + Any cursor key and that will rotate your desktop too (Up = Upside down, Down = Normal, Right = 90 deg clockwise and Left = 90 deg anti-clockwise)

Hope this helps
 

If it don't works don't blame me coz its not suitable with latest video cards...................