

Ahead of the
rollout of Windows 10 version 20H2 update, Microsoft has
re-released KB4023057 to some devices in the production
channel.
KB4023057 is a reliability update that is re-issued regularly
by Microsoft before the launch of a feature or major cumulative
update.
In this case, it appears that Microsoft is rolling out the
patch to devices that may not be ready for Windows 10 version
20H2.
Windows 10 KB4023057 was re-issued on September 10 to devices
running Windows 10 version 1507 or newer with changes to
following the components:
- Expediteupdater.
- Qualityupdateassistant.
- Sedplugins.
- Uhssvc.
- Unifiedinstaller.
KB4023057 was first published in September 2018, re-released in
January 2019, re-re-released in August 2020, and it has been
released again on September 10. This patch includes reliability
improvements to Windows Update service components and it’s
designed for all in-market versions of Windows 10.
The update is offered to users via Windows Update but not
through WSUS or business channels.
After the patch is applied to your device, it may attempt to
reset network settings, clean up Registry settings that may
unintentionally prevent updates, repair or disable corrupted
components, compress files in the user profile directory, and
reset the Windows Update database to repair problems
As you can see, this patch attempts to undo changes (including
Registry hacks) that prevent Windows Update from working. The
goal of KB4023057 is to fix the problems that may
unintentionally affect the update processes in Windows 10 and
prevent important updates from being installed.
It’s also worth noting that you may want to avoid KB4023057 if
you don’t want Microsoft to enforce feature upgrades on your
device.
If the update shows up in Windows Update but you’re unable to
apply it due to generic error messages, it’s possible that the
patch is already installed and you can try removing the
existing package by heading to Settings > Apps & features,
and then click on the package to see the “uninstall” option.