While updating one of our managed services customers, Nick noted an error while patching. These were errors generated on a Windows 2012 R2 domain controller that is normally a rock with the cleanest event logs ever seen.
Event ID 30 was logged during system reboot. While concerning, the error cleared during the next reboot. The patch may have introduced a race condition which resolved at the next startup and shutdown cycle.
February 2016 had some hiccups. There are additional issues noted in this article: