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ITsVISTA KB-Link: KB967191

The Windows Experience Index rating and the WinSAT command do not work correctly on a Windows Vista-based or Windows Server 2008-based computer that has more than 8 logical processors

When you are running Windows Vista or Windows Server 2008 on a computer that has more than 8 logical processors, the Windows Experience Index rating is unavailable in the system properties. Additionally, when you run the WinSAT command (Winsat.exe), the command exits with a fatal error message. For example, you receive the following error message when you run a WinSAT CPU -Encryption command:

Error: The WinSAT XML does not adhere to the schema.

This problem occurs on a computer that has more than 8 logical processors. For example, you have a computer that has two quad-core processors and hyper-threading is enabled for these processors. In this example, you have 16 logical processors because hyper-threading makes each core appear as two logical processors to the operating system.

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 KB967191.

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