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Windows Server 2008 and Windows Server 2008 R2 may hang on boot with the Hyper-V role enabled

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Symptoms

Consider the following scenario:

Install Windows Server 2008 or Windows Server 2008 R2.
Enable the Hyper-V Role under Server Roles.
The machine hangs or encounters a 0x3E bugcheck (MULTIPROCESSOR_CONFIGURATION_NOT_SUPPORTED) after you restart the machine.

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Cause

On a system with Mixed Processor Steppings, the Memory type range registers are not consistent across all the processors.  When the Hyper-V role is enabled, this can cause system instability.

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Resolution

Ensure that all Processor Steppings are consistent (MTRR Capabilities) across all processors that are installed on the system. 

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More Information

It is not recommended to have processors with Mixed Steppings installed if you are intending to install and enable the Hyper-V Role on Windows Server 2008 / 2008 R2. 

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Keywords: kb

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Article Info
Article ID : 2686812
Revision : 1
Created on : 1/7/2017
Published on : 4/25/2012
Exists online : False
Views : 191