We have a Windows Server 2012 domain controller that is no longer logging off a server console user correctly. Services are no longer operating. A hard restart sometimes shows Windows updates being applied and as of now, after about 24 hours we get the login prompt. There are no other servers in the domain. If I login the server console, then it sits at "Applying computer settings". RDP is not functioning. There are about 10 computers on the domain and 10 users. Users are able to login the domain from their workstations and access the file shares. I have not been able to determine what happened to cause this disaster.
I would like to attempt to migrate the Active Directory that is on the Windows Serve 2012 to a new Windows Server 2012 R2. I have not run dcpromo on the R2 server. I have not taken the R2 server to the client. Does anything need to be done to the Windows Server 2012 before I try the migration to an R2 server? Other ideas to recover from this situation are welcome.