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ITsVISTA KB-Link: KB967646

The operating system may stop responding when a Windows Vista-based or a Windows Server 2008-based computer that has multiple video cards resumes from sleep

You are using a Windows Vista-based or Windows Server 2008-based computer has multiple video cards installed. When the computer resumes from sleep (S3), the operating system may stop responding.

Note: If you are running an application that uses the DirectX kernel driver, a black screen may appear.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB967646.

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