The issue has been documented on both Windows 2003 and Windows 2008 servers.When you launch the SEPM console locally on the server, you are prompted to enter administrator credentials.I don't like companies that make/sell those types of tools and I find it hard to not launch into a rant on the topic...
Here are 3 methods to fix KB3200970 failed to install issue caused by different errors and reasons.
Whenever you stuck into a situation that cumulative update for Windows 10 Version 1607 for x64-based systems KB3200970 fails to install, stuck or reboots and prevents you from getting the new update, just try the solution work best for your case to find a way out.
After you enter your login information, the login screen appears to hang and the SEPM manager never launches.
The issue is caused when the server running the console unexpectedly shuts down, or the Symantec software is updated to Version 12.1 or a newer version, causing the sem5file to become corrupt.
But that is NO guarantee it will work well now, or in any future version of AV or Thunderbird.