You are a consumer support technician. One of your customers installs Windows Vista on a computer that meets the minimum hardware requirements to run Aero.

The customer is unable to start Aero.

You need to identify why Aero is not starting.

What could be causing this?

A.
The graphics driver is not compatible with WDDM.

B.
There are an excessive number of startup programs.

C.
The Windows Color System service (WcsPlugInService) is set to manual.

D.
The Desktop Window Manager Session Manager service (UxSms) is set to automatic.