One of the updates that was released as part of the October 2014 Patch Tuesday release, kb2984976 requires multiple reboots on Windows 7 and Windows 2008 R2 when deployed as a software update in a Task Sequence and breaks the task sequence. It is actually in the description for the KB, “You may have to restart the computer multiple times when you install this update”
The KB article that lists all updates that requires multiple reboots and breaks task sequence execution after the Install Software Updates step is not updated yet when writing this. The article with the well.-known updates is “Software Updates That Require Multiple Reboots may Cause Task Sequence Failure within Configuration Manager“ http://support.microsoft.com/kb/2894518/
The reports of this started to appear on forums last friday. Thanks all for sharing the issues they see..