Hyper-V Rollup fixes Clock_WatchDog_Timeout and MEMORY_MANAGEMENT stop errors with newer Intel CPUs

865x321_TheServerUnleashed[1] Some more recent Hyper-V processor performance updates released by Intel were not anticipated by Windows Server 2008 R2 and require the following updates. People who were experiencing this problem may have used workarounds to disable ACPI functionality thereby reducing the performance advantages of these newer processors.092085-010[1] I am writing this post to raise awareness that the workarounds can be undone after the update is installed restoring the performance of more recent Intel processors.

The issues described in KB2264080 are resolved by the rollup package which is automatically available through Windows update

More information:

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

975530 (http://support.microsoft.com/kb/975530/ ) Stop error message on an Intel Xeon 5500 series processor-based computer that is running Windows Server 2008 R2 and that has the Hyper-V role installed: "0x00000101 – CLOCK_WATCHDOG_TIMEOUT"

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

974909 (http://support.microsoft.com/kb/974909/ ) The network connection of a running Hyper-V virtual machine is lost under heavy outgoing network traffic on a Windows Server 2008 R2-based computer

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

981791 (http://support.microsoft.com/kb/981791/LN/ ) "STOP: 0x0000001a" error message on a computer that has an Intel Westmere processor together with the Hyper-V role installed on Windows Server 2008 or on Windows Server 2008 R2

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

The Intel Westmere processor has a microarchitecture that is a 32-nanometer (nm) variant of the Nehalem microarchitecture. The models of the Intel Westmere processor that are affected by this issue include the Xeon Processor 5600 series.
For more information about the Xeon Processor 5600 series, visit the following website:

General information about the Intel Xeon Processor 5600 series (http://www.intel.com/p/en_US/products/server/processor/xeon5000)

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Jeff Loucks
Available Technology
Available Technology

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