It is certainly a difficult issue, we could try to run the update again with Process Monitor and Boot Logging enabled.seems difficult to diagnose!
Capture Process Monitor BootLog
1. Download and run Process Monitor. Leave this running while you perform the next steps.
2. Select the Options....Enable Boot Logging option. A Enable Boot Logging dialog will come up. Just click OK.
3. Create a folder on your desktop named BootLog.
4. Attempt to install the update just like you have in the past. Let the machine reboot and revert just like it has in the past.
5. After the machine has rebooted and come back up to the desktop, open Process Monitor again. A message box will come up telling you that a log of boot-time activity was created and ask if you wish to save it. Click Yes and save to the BootLog folder on your desktop.
6. This may take some time as it converts the boot-time data. Allow it to finish.
7. Zip up the entire BootLog folder on your desktop and upload to a file sharing service of your choice for my review. Examples of services to upload to are Dropbox or OneDrive or SendSpace