Windows 10 KB4586819 is now rolling out to users via the new
‘Optional updates’ section in the Windows Update Settings.
This is an optional release and it won’t download or install
automatically on your device until you hit the ‘Download and
install’ option after navigating through multiple pages in the
This patch comes with a long list of fixes and improvements.
For example, Microsoft says it has resolved an issue that
causes File Explorer to crash when namespace extension products
In other words, File Explorer might crash when you type in the
search box and third-party customizations are applied to the
Explorer window. Likewise, Microsoft has also resolved
issues with ‘Open File’ dialog box in File Explorer.
Windows 10 KB4586819 optional preview update also comes with
fixes for certain games that use audio spatial. When the audio
spatial feature is enabled, a bug in Windows 10 causes the
games to stop responding to your keystrokes or mouse clicks.
Another bug has been fixed where Graphics Device Interface
(GDI) Font Handles will result in unexpected behaviours in
Microsoft has also fixed an annoying issue with USB 3.0. In
some configurations, Microsoft observed that devices connected
to the USB 3.0 hub might stop working when you restart the
device. To fix this, you would need to disconnect and reconnect
the device manually or install the optional preview from
It’s also worth noting that KB4586819 is rolling out devices
with Windows 10 version 1909 or version 1903 only. If you’re on
version 20H2 or version 2004, Microsoft plans to release
another update with identical fixes later this month or in the
first week of December.
In December, Microsoft is planning to focus on security updates
fewer updates will be released. This would mean that the
next batch of optional previews will be published in the third
or fourth week of January.
Unimportant updates are being delayed to allow for Microsoft
engineers to focus on necessary fixes.