Strange Windows server 2003R2 errors, where to dig?

Question

Windows Server

It worked without any problems, today the rdp connection stopped working, decided to reboot, the problems started, the download became extremely long before the login window for about half an hour, if not more, I went into safe mode to see the logs, the safe mode loaded in time just as long when trying to enter the event viewer I get the error "Could not complete operation on 'application' RPC server unavailable" , decided to check the service at service logon error "Could not open Service Control Manager database. error 1307 : This security code cannot match the owner of the object."

Answer 1

Most likely the tin is actively dying.
Bury the corpse.
Everything breaks down sometime, even if it works almost autonomously.