On Feb. 12 I installed an updated DisplayLink driver that was an optional update suggested by Windows Update. Details follow. Since that update was installed I cannot select an Aero theme and I get this error message:
The current video card may support Aero with a driver that is compliant with the Windows Display Driver Model (WDDM). Contact the manufacturer of your computer or video card for a WDDM-compatible driver.
The drivers for my graphics system are the same as before the update and I have the latest drivers for both my Intel Graphics media accelerator HD and NVIDIA GeForce GT 33M. Screen refresh is so slow that dragging a window across the screen leaves about a dozen images of the border for a half second or so. Also my BlackBerry software does not write the window so I cannot update my PDA. Here is the data about the updated driver.
DisplayLink Corp. - Other hardware - DisplayLink Display Adapter (0036)
Installation date: 2/12/2014 8:57 AM
Installation status: Successful Update type: Optional
DisplayLink Corp. Other hardware software update released in December, 2013
More information:
http://sysdev.microsoft.com/support/default.aspx
Help and Support:
http://support.microsoft.com/select/?target=hub
The Kensington MultiDisplay USB adapter is still working and I can use both screens. How do I get my fast screen graphics back?