Since that feature is specific to the video drivers provided by the
manufacturer, try installing the current correct one from the
manufacturer, NOT Windows Update. Windows Update will not always give
you the best one for your adapter, and things don't always go so well
after that.

Smirnoff wrote:

> A friend of mine had the classic problem of his screen rotating 90
> degrees. I explained that he needed to hit Ctrl+Alt+Up Arrow.
>
> I went to show him on my machine - and nothing happened!
>
> Checked Graphic Properties and Rotation is enabled. Also, the Hot Keys
> are enabled as well.
>
> Not that I want the irritation of having the screen rotate, in fact I
> never use rotation but I am intrigued as to why it doesn't work.
>
> It works if I select it in Graphic Properties>Rotation.
>
> My Ctrl+Alt keys work OK as I often call up Task Manager.
>
>