Windows 10 KB4565351 & KB4566782 updates plagued with critical bugs

Windows 10 BSOD

Windows as a Service is updated frequently with fixes and
improvements. On August 11, Microsoft published the latest
batch of monthly security updates for Windows 10 version 1909,
version 1903, and version 2004.

Users are now reporting that the Windows 10’s August 2020
cumulative updates fail with an uninformative error message of
some variety. Windows 10 KB4565351 and KB4566782 are causing
installation problems for users whose machines run the November
2019 Update (1909) and May 2020 Update (version 2004).

When installing Windows 10 KB4565351 (v1909) and KB4566782
(v2004), users are saying that they are being greeted with
unhelpful error messages, including 0x800f0988, 0x800f081f, and
0x800f08a.

“There were some problems installing updates, but we’ll try
again later. If you keep seeing this and want to search the web
or contact support for information, this may help:
(0x800f081f),” one of the error messages reads.

Windows 10 KB4566782 installation issues

The installation issue appears to be hitting both Windows 10
KB4566782 (version 2004) and KB4565351 (version 1909/1903). The
most-reported error code is 0x800f081f and it could be related
to missing files in the WinSXS folder that stores
different copies of DLL and system files.

“Can not install KB4566782 on two completely separate
computers, one at work, one at the office. It restarts, keeps
rotating on a black screen and eventually unable to be
installed when you reboot,” one user noted on Twitter. The
issue has also been reported by users on Microsoft’s community
forum, Reddit,
and Feedback Hub.

While there’s no official workaround, you can try manually
downloading and installing the cumulative update from the
Microsoft Update Catalog. This could allow you to install the
updates when the automatic installation is failing.

To fix Windows Update error code 0x800f081f, manually install
the patch by following these steps:

  1. Open the Microsoft Update Catalog website.
  2. Enter the update package number into the search bar.
  3. Highlight the correct version that’s compatible with your
    PC.
  4. Click ‘Download’ next to the update package.
  5. Click on .msu link to download it.
  6. Double-click on .msu file to apply the update.
  7. Reboot.

Alternatively, you can pause the update that caused the
installation in the first place. This can be found by going to
Settings -> Update and Security -> Windows Update ->
Pause updates.

Apparently, this doesn’t seem to have worked for everyone and
people are still failing to install Windows 10 August 2020
cumulative updates. If nothing works for you, it might be
better to wait until Microsoft refreshes the update package on
Windows Update.

Other problems

It’s worth noting that Windows 10 KB4565351 is also breaking
audio for some users and there are reports of Blue Screen of
Death with “SYSTEM THREAD UNHANDLED EXCEPTION” error on
Feedback Hub.

In a Reddit post, one user noted that KB4565351 trashed the
audio drivers with “no audio output is enabled” error.
Likewise, another user observed that the sound stops coming
from their USB headphones when the update is applied.

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