NOF constantly looking to reboot, will not uninstall, appears not to be running

Somehow my 14-yr-old has figured out how to hack through NOF and has completely messed up the install. NOF constantly puts up a "NOF needs to reboot this computer" message. Clicking Yes reboots the computer, but does not get rid of the message. I never see the service running in the tray either. Tried downloading and installing the s/w again, but it says the download is older than what is already installed. Ouch.