title: VERR_VMX_MSR_VMXON_DISABLED when starting an image from Oracle virtual box
body: <p>I'm getting this error while loading a Puppet image from a Oracle virtual box. How can I fix it?</p>
  
  <pre><code>Failed to open a session for the virtual machine learn-puppet-centos-6.4-pe-3.1.0.
  
  VT-x is disabled in the BIOS. (VERR_VMX_MSR_VMXON_DISABLED).
  
  Result Code: E_FAIL (0x80004005)
  Component: Console
  Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}
  </code></pre>
  
  <p>In addition, I see that the <code>acellerate</code>-tab in Virtual Box is disabled.</p>