Question : SBS 2003 "Sc delete netlogon" how do I undo this command or install netlogon as a service

After seeing a suspicious service on my SBS 2003 server "netlogon Z12"  I thought I would delete it.
I typed in "SC delete netlogon Z12" Just as I hit enter I realised that this would infact delete the netlogon service.
I was right and have identified that the netlogon service is currently marked for deletion.
I am yet to restart the server as I understand I won't be able to login. Since this is an SBS server & I don't have another domain controller none of my users will be able to login.
Can any one advise me on how I could undo this major stuff up.

Answer : SBS 2003 "Sc delete netlogon" how do I undo this command or install netlogon as a service

Make a backup (we'll be in the registry)

regedit->HKLM->System->CurrentControlSet->Netlogon

on the right panel, you will see an entry called "DeleteFlag" with a value of 1.  Two guesses what that does...   ;)

Delete the entry (don't just change it to 0, completely delete it)

Go to services and make sure the startup value is set to Automatic (marking a service for deletion changes it to disabled)

Reboot. Better to find out if things went badly now then later.