Look at the Microsoft Blog here: https://blogs.technet.microsoft.com/msrc/2017/02/14/february-2017-security-update-release/
And what Qualys says about it, including the Adobe Fix for Flash: http://blog.qualys.com/laws-of-vulnerabilities/2017/02/14/microsoft-february-patch-cliff-hanger-and-adobe-fix-for-flash
And I was just being hammered by two Insiders here who claim that Users are to blame for the failed WUs: http://answers.microsoft.com/en-us/windows/forum/windows_10-performance/failed-cumulative-wus-is-the-current-approach-for/22531774-9710-496d-b7d7-4e81d715204d