You receive the error message "virtual machine could not start because the hypervisor is not running" in Windows Server 2008 or Windows Server 2008 R2

Consider the following scenario:

1. You install the Hyper-V role on a computer that is running Windows Server 2008 or Windows Server 2008 R2.
2. You create a virtual machine and attempt to start the virtual machine.
3. You may see the following event id



In this scenario, you are unable to start the virtual machine and receive the error message below:

Virtual machine could not start because the hypervisor is not running.

The Data Execution Prevention (DEP) setting is not enabled in BIOS. For HP server, it is called "No Execute Memory Protection"

To fix the issue, enable the DEP setting in BIOS

Hyper-V Installation Prerequisites: http://technet.microsoft.com/en-us/library/cc731898.aspx (http://technet.microsoft.com/en-us/library/cc731898.aspx)

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