How can I find out what Windows Server Release I have installed. I did find I have DHCP turned off. So many updates refer to Server Releases. Specifically, today kb4012218 failed and refers to Server release 2003 as I recall.
Windows Servers are not my area of expertise. However, I found these two threads that may be helpful:
How to detect Windows Server 2003/2008 Release (R1 or R2) programatically? - Server Fault (http://serverfault.com/questions/189655/how-to-detect-windows-server-2003-2008-release-r1-or-r2-programatically/189664)
How can I tell if I have Windows 2012 R2 (vs the 'R1' original release')? - Server Fault (http://serverfault.com/questions/554378/how-can-i-tell-if-i-have-windows-2012-r2-vs-the-r1-original-release)