First, shut down the virtual machine. Make certain that you’ve enabled VT-x/EPT in your virtual machine. Modify the vmx file associated with your virtual machine and add the following lines to the end of the VMX file: hypervisor.cpuid.v0 = “FALSE” mce.enable = “TRUE” Restart your virtual machine.
http://blogs.technet.com/b/hollis/archive/2012/05/02/windows-server-2008-r2-sp1-hyper-v-best-practices-and-tuning.aspx GENERAL (HOST): * Use Server Core if possible, to reduce OS overhead, reduce potential attack surface, and to minimize reboots (due to fewer software updates) * Hyper-V services should be configured to start automatically, to ensure uninterrupted VM services after reboots. (Verify in Administrative Tools à Services): Hyper-V Virtual Machine Management Service … Read more
http://support.microsoft.com/kb/2249906?wa=wsignin1.0 icacls “C:\Program Files\Microsoft Learning\20417\Drives\20417A-LON-DC1\Virtual Hard Disks\20417A-LON-DC1.vhd” /grant “NT VIRTUAL MACHINE\ 09C72D4C-53D1-44B5-A2F6-43830044D4C7”:F =============================================================== Hyper-V virtual machines may not start, and you receive an error: “‘General access denied error’ (0x80070005)” Article ID: 2249906 – View products that this article applies to. Expand all | Collapse all SYMPTOMS A Hyper-V virtual machine may fail to start and you receive … Read more
Edit VMX configuration file of virtual Hyper-V server and at the end add the following line: hypervisor.cpuid.v0 = “FALSE” Machine must be turned off. After adding line, power on virtual Hyper-V server and everything will be ok.