i have a server 2008 host running in a 2008 DC environment. All working fine for over a year into production.

One day the NLA service just went down, and server stopped servicing clients.

I managed to start it back by 

Run the commands 

net localgroup administrators localservice /add
net localgroup administrators networkservice /add

But I would like to know why the service went down just like that. No changes to the system permission wise, was made. Or am i missing something here?

I can see just this event in log "The Network Location Awareness service terminated with service-specific error %%-1073741288.

Thanks

this is pretty much about it... anything specific you are looking out for?