Inaccessible Boot Drive after Update? Solved - Page 4 - Windows 10 Forums

Mine Started there in that forum - and I was not Original OP so I agree - should have created a new thread as I was...

My issue returned... unable to restore back to prior Jan 15 2x critical updates... choose the oldest and restore - no go...

Currently booting off of W10 media to test other repair options and...

what were the outputs of the commands from Inaccessible Boot Drive after Update? - Page 2 - Windows 10 Forums

it looks like C: is the correct drive for your system - however a dir output would...

Which drive has your windows directory and files in it..
X: is a ram drive created by the recovery ...
you need to find which drive has your os on it..

basically
type: b:
dir

then c:
dir

you able to get into recovery trouble shooting options and get into cmd prompt?

need to locate which drive has BCD data on it...

in my case it was e:\

although a full rebuild of the BCD...

have to use the DISM via CMD in troubleshooting to find the most recent KB installed....
mine was a C++ but was able to roll back a few days on that one only... ~10/11th jan 2018 - still never...

I also had SSD in mine -
the Jan 11 restore worked for me... the dism route removes updates that may have caused...
but yes a complete and total $*&T show by MS updates on these....

Currently...

also dealing with this morning..
T5500 Dell precision - older Dual Xeon CPUs

Updates as of ~4am this morning so should be Jan 13-15 2018 updates causing issues.

AV is vipre and is compatible...

Same issue clean install on 1607...
one machine resolved it - can't remember steps...
one fix involved onesyncsvc registry from 4 > 1 i think - that didn't resolve yet..
another credential...