After installation of KB4056892 boot failure, after roll-back error 0x800f0845

Question

Hi,

I have older AMD Athlon 64 X2 6000+, Asus MB, after installation of KB4056892 the system doesn't boot, it only shows the Windows logo without animation and nothing more. After several failed boots it do roll-back then it shows error 0x800f0845. Unfortunately, it seems it's not easy to disable the automatic updates without gpedit tweaks, so it tries installing and rolling-back the update over and over. The sfc /scannow shows no problem, in-place upgrade also doesn't seem to help. I can try full reinstall, but I doubt it will change anything. It seems like the update is binary incompatible with my old CPU. I understand that making the machine unbootable is the best protection from remote exploitation, but I would rather have the OS working. Especially if my CPU is not vulnerable to the Meltdown attack and the MS mitigation attempts for Spectre is more than questionable. I could find only some German and Italian people reporting the same issue (well the CPU is quite pre-historic and the KB update is very fresh), but no info / acknowledgment from the MS so far. I have Czech localization. Could anybody provide more information?

Answer 1

yes, because maybe you have Virtualization or HPET disabled in BIOS, otherwise it cause Windows to stuck in Windows logo.

Answer 2

I have the same issues with a ten years old AMD Athlon X2 64! When I try to reboot, it it does not hang it tries to roll-back (in italian "ripristino") but then it cocludes it cannot roll-back and proposes Advanced Options (AO). 

Can I try to recover from DOS box in AO? or should I try only to reinstall Windows saving the personal data? or what else?

I have a lot of software there (MSYS2+MINGW32/64, WSL aka Ubuntu on Windows etc., and reinstalling fro scratch would be very annoying... and maybe that would not be enough because Windows would try to reinstall this Dangerous upgrade!

Ciao,

 Angelo.

Answer 3

you can recover you Windows using a System Restore Point previous to the update, and then you can pause Windows Updates until next update or until we have some news about if Microsoft have fixed the bug or not.

http://news.softpedia.com/news/windows-10-cumulative-update-kb4056892-meltdown-spectre-fix-fails-to-install-519238.shtml

Answer 4

you can recover you Windows using a System Restore Point previous to the update, and then you can pause Windows Updates until next update or until we have some news about if Microsoft have fixed the bug or not.

http://news.softpedia.com/news/windows-10-cumulative-update-kb4056892-meltdown-spectre-fix-fails-to-install-519238.shtml

...but the update does not create a restore point... Windows 10 has disabled by default this... and the user does not imagine the the update could be catastrophic...

How can one stop Windows Updates? Please explain..

Thanks,

 Angelo.

Answer 5

For recovery I booted the machine two times, both boots ended by hardlockup, so I powered the machine off and started it on again. During the third boot it automatically rolled back the update, then I disable automatic updates by gpedit. On windows Pro it can be done by e.g.: https://www.windowscentral.com/how-stop-updates-installing-automatically-windows-10