Last month I received an update from Microsoft which blocked windows from booting and after a few attempts to resolve I reverted, disabled updates, and continued working as I had other things to do that day so I could keep my private research funding. BUT Today I decided to take initiative since I could not find any information about this anywhere else and Windows updated itself while I was not paying attention causing the problem all over again.
I cut down my boot logs into 2 files as I always keep boot logging and "No-GUI" enabled.
ntbtlog_BAD.txt is the log section where windows boots to a black screen with cursor, the log shows that windows is repeatedly ignoring the 3 main processor drivers for the CPU, GPU, and Power Management in the laptop, I can get into the security menu and restart or attempt to launch task manager but launching task manager loads for 20 Minutes and does nothing all I can do in this state is reboot into the F8 recovery and revert to a pre-update state
ntbtlog_GOOD.txt is the log where windows successfully boots without any issues and all drivers load perfectly fine post-revert.
I marked the last date Windows update says an update was successful without a revert in WindowsUpdate.log with:
"!!!!END OF LAST SUCCESSFULL UPDATE WITHOUT BLACK SCREEN OR REVERT!!!!"
Which you'll need to copy-find-paste-search because it is a LONG log over a megabyte in size.
I also included a System Info Dump incase it's necessary.
So, we know WHY is it happening, and HOW it's causing the dreaded black screen, But we don't know WHAT part of the update is causing it and HOW to fix it temporarily.