Error “hypervisor is already running” with the addition of Hyper-V role in Windows Server 2012 R2

If you add a Hyper-V role in Windows Server 2012 R2 in a virtual machine may get an error “hypervisor is already running” or “Hypervisor is already running”. Officially, Windows Server 2012 R2 does not support “virtualization inside a virtual machine,” but there is a way around this problem and add the role of Hyper-V. First, you must make sure that the host CPU supports virtualization VT-d, enable this option in the BIOS and configure virtualization support in the virtual machine settings, in the settings of the processor daw virtual intel vt-x / ept or amd-v / rvi.
Then in the folder with the files of the virtual machine you need to find the file * .vmx, open it with any text editor and add at the end:
hypervisor.cpuid.v0 = “FALSE”

All you can install Hyper-V role and run virtual machines.

All the procedures proposed in the article are suitable and tested for VmWare Workstation 10.0.1 build-1379776.