Update for Hyper-V R2 and CPU Issue KB981791
Assume that you have a computer that is running Windows Server 2008 or Windows Server 2008 R2 together with the Hyper-V role installed. In this scenario, you receive an error message that resembles the following:
STOP: 0x0000001a ( Parameter , Parameter , Parameter , Parameter ) MEMORY_MANAGEMENT
This issue occurs because Intel Westmere processors have a new Virtual Machine Control Block (VMCB) caching feature. This feature is added to provide a virtualization assistance to increase the hypervisor performance. Because this feature was introduced after Windows 2008 SP2 and Windows 2008 R2 were released, the hypervisor does not handle the VMCB caching correctly. Therefore, the system memory may be corrupted. This behavior can cause the stop error 0x0000001a.
"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