title: Stderr: VBoxManage.exe: error: VT-x is not available (VERR_VMX_NO_VMX)
body: <pre><code> PS C:\vagrant_projects&gt; vagrant up
  Bringing machine 'default' up with 'virtualbox' provider...
  ==&gt; default: Checking if box 'opentable/win-2012r2-standard-amd64-nocm' is up to date...
  ==&gt; default: Clearing any previously set forwarded ports...
  ==&gt; default: Clearing any previously set network interfaces...
  ==&gt; default: Preparing network interfaces based on configuration...
     default: Adapter 1: nat
  ==&gt; default: Forwarding ports...
     default: 5985 (guest) =&gt; 55985 (host) (adapter 1)
     default: 5986 (guest) =&gt; 55986 (host) (adapter 1)
  ==&gt; default: Running 'pre-boot' VM customizations...
  ==&gt; default: Booting VM...
  There was an error while executing `VBoxManage`, a CLI used by Vagrant
  for controlling VirtualBox. The command and stderr is shown below.
  
  Command: ["startvm", "efff1950-9700-4fbf-8ab8-7a8ed3f31740", "--type", "headless"]
  
  Stderr: VBoxManage.exe: error: VT-x is not available (VERR_VMX_NO_VMX)
  VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole
  </code></pre>
  
  <p><strong>I am facing the above issue when i tried to "vagrant up" win-2012r2-standard-amd64-nocm box.</strong></p>