I have been running win 2k pro for a while with no problems. Yesterday a blue screen flashed quickly and my computer tried to reboot. I have since tried to reboot it several times but it hangs up at the logon screen. Eventually a "Logon Message" will appear and tells me: "Unable to log you on because the netlogon service is not running on this machine." I have not stopped this service, but anyway, how can I restart this service? I can't use safe mode either. It hangs up the same way as when I am trying to boot.