The WindowsConfiguration.RebootOption enumerated type specifies what should be done to the guest after the customization.
REBOOT : Reboot the guest after customization.
NO_REBOOT : Take no action. Leave the guest OS running after customization. This option can be used to look at values for debugging purposes.
SHUTDOWN : Shutdown the guest after customization.
Enumeration: NO_REBOOT, REBOOT, SHUTDOWN,