same problem: I figured out how to access some of the disk from the black screen (the desktop profile is missing) and only a recycle bin showing.
use cntrl-alt-delete. that "may" open a page with the option of "task manager."
select that.
A popup "Task manager" will start.
select File.
from the drop down screen, select "run new task."
from there you can type in a command to run or
go to the lower right and select "Browse."
select Browse will let you have an explorer to browse what is left on the hard drive after the carnage from 1803.
hope this helps.
for me, I found that 80% of my files are gone. The folders are there but are empty.
very very sad. MS really did it this time. ...so much data lost, so many programs lost.. and I made several system restore points before doing the update--which the update erased, along with resetting partitions, making the BIOS unstable--reset the system
clock a month ahead--so, rollback got very confused--it was trying to rollback but the clock was saying too many days had gone by-- Whaat A Mess! --Microsoft what are you going to do?