Initially all security updates on Oct 8 for my Win 7 Pro x64 failed to install (I run a VERY clean system and never had any issues before with this build); even trying an update one at a time resulted in individual failure.
I reverted to an old backup from July 2013 and the Oct 8 security updates AGAIN failed to install.
Yesterday I revisited the update page and managed to install all the updates except one which again consistently fails.
Windows6.1-KB2864202-x64
Interestingly it is related to some USB update and I've noticed another user entry stating that the USB security update as well made updates to fail.
Whatever the issue is MS, this group of updates has problems and you need to reassess these updates.
Thank you for your time.