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Sean Killeen

Just a guy trying to get better at writing bios.

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Technology Involved

  • Win7 Pro x64
  • VirtualBox 4.1.x
  • CentOS 5.x


When attempting to install a CentOS Guest VM from a VirtualBox Win7 x64 host, the installation appears to hang shortly after beginning.

The last line of text on the screen is:

NET: Registered protocol family 2


Per this thread (referencing an older version of VirtualBox but still relevant), the fix is as follows:

  • Go into the settings of the VM
  • Click the System section.
  • Check Enable IO APIC.
  • Save the settings.

When you start the install again, it will proceed normally.