We tried clicking the "Roll-Back Driver" button in WinXP,
but that accomplished nothing.
My friend needs to be able to rotate the screen 90 degrees,
and since "Updating the driver" that is no longer an option in the Display Manager.
My friend has a Dell XPS Desktop.
The Original LCD Monitor That Came With The Computer Is Square and On The VGA Port.
This weekend I added an Acer X193w LCD to the DVI Port.
We mounted the Acer "Portrait" style and rotated the screen 90 degrees (using the orig windows drivers).
The Acer 19" Widescreen is capable of 1440 x 900 resolution,
and when that wasn't an option on the display driver,
we clicked on "Update Driver" in the Device Manager for Windows.
The driver updated, and not only is 1440 x 900 NOT an option,
the ability to have the 2nd monitor rotated "Portrait" style or 90 degrees is also gone.
Please help... we are willing to sacrifice the resolution just to have the ability to rotate the screen 90 degrees again.