Hi, i've been having this problem for weeks now and its starting to get tiresome.
I've tried DISM, SFC, temp clean ,clean boot
None of theses seems to have worked in successfully upgrading my windows 10 to win 10 1909 ever since i re-enabled windows update
It seems my pc during restarting/installing windows updates then crashes, then it displays 'Undoing changes'
When i log-in it some's up with an error saying it failed:
FIRST_BOOT_FAIL
BEGIN_FIRST_BOOT_FAIL
This has happened more than once
I'm now tiring to attempt a repair-reinstall or my windows 10 Pro 1709 (build 16299.1127) but im finding it hard to find sites to download sites to download an ISO with the same build(or higher)
EDIT: now i just want to update to the latest version, but my pc just keeps crashing or undoing updates during restarting