It isn't every security update that fails. We deploy security only updates right now and will as needed deploy a quality roll up. The March security only update didn't install on this server but April and May did. I just tried to install the May Quality Rollup (4019215) and it failed.
Ran SFCFix and it says source files can't be downloaded. Contents of the log file are here:
=====================================================
SFCFix version 3.0.0.0 by niemiro.
Start time: 2017-05-25 14:39:50.157
Microsoft Windows Server 2012 R2 Update 3 - amd64
Not using a script file.
AutoAnalysis::
SUMMARY: No corruptions were detected.
AutoAnalysis:: directive completed successfully.
Successfully processed all directives.
SFCFix version 3.0.0.0 by niemiro has completed.
Currently storing 0 datablocks.
Finish time: 2017-05-25 16:04:02.685
----------------------EOF-----------------------
=====================================================
CBS. Files are a little large.
Dropbox - CBS.zip
