For windows support libguestfs 1.17.17 or above is needed. Ubuntu 12.10 (Quantal Quetzal) or above is required.
A patch written by the CERN is also required for Windows customization support: https://twiki.cern.ch/twiki/bin/view/Sandbox/LuisFernandezAlvarezSandbox
def customize(self, libvirt_xml):
def is_generalize():
g_handle = self._guestfs_handle_setup(libvirt_xml)
try: