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I have a host machine with the following specs: Windows 7 Ultimate 64bits 8GB RAM

and then I set up an virtual machine by Orable VirtuaBox with the following specs: Windows Server 2008 R2 64bits 4GB RAM

In the VM, Hyper V was unable to activate due to virtualization has been disable in the VM.

after couple of search, I found that VirtualBox not allow to create another nested virtual machine.

Is there any work around if I wanted to work in multiple virtual machine environment?

thank you in advanced.

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Sorry, but I'm voting to close this as too localised. There really is no good reason to run nested virtualization products. –  Ben Pilbrow Dec 28 '11 at 19:06
Is hardware virtualization enabled in the guest settings? To activate it in the guest, it will need to be enabled in the BIOS as well. –  Tim Dec 28 '11 at 19:19
As you found in your searching, VirtualBox doesn't allow nested virtualization. If you need it, get a virtualization platform that supports it? –  Shane Madden Dec 28 '11 at 19:26
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2 Answers

There is no workaround as Hyper-v needs access to the VT instructions that are not presented by virtualbox. I believe that the latest version of virtualbox will run on a hyper-v host however.

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VMware Workstation also allows for nested virtualization.

I set up an entire virtual platform (SAN, two ESXi nodes and a vCenter Server on a 2008 R2 instance) for demonstration purposes.

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