Windows Driver Model: A framework for device drivers that was introduced with Windows 98 and Windows 2000 to replace VxD, which was used on older versions of Windows such as Windows 95 and Windows 3.1, as well as the Windows NT Driver Model.

The information in this article applies to the following configuration(s):

• Catalyst Software Suite - 64 bit
• Catalyst Display Driver 7.1
• Radeon® X800 GT
• Windows Vista 64-bit Edition

Symptoms:
Opening any window or application results in WDM being unloaded on a specific X800 GT variant