NPE: Do you have to be connected to Internet during reboot?

When you run NPE and check the rootkit option, and click the "Restart" button, do you have to stay connected to the Internet while your PC shuts down and reboots?   Normally I don't like to be connected to the Internet during shutdown and reboot.  And if connectivity IS required during restart, will NIS11 automatically allow NPE the firewall permissions to run during startup?  Thanks!