Windows 10 KB4577586 forced update rolling out to remove Flash Player

A new update is rolling out to Windows 10 version 20H2, version
2004 and older to permanently remove Adobe Flash Player.
Windows 10 KB4577586 is said to be an optional update, but it
seems to be downloaded automatically when we click on ‘Check
for updates’ button.

It appears that Microsoft is actually pushing Windows 10
KB4577586 as an automatic update with the
February 2021 cumulative updates. This patch will represent
a final goodbye to Adobe Flash Player for all versions of the
operating system and it will be pushed via Windows Update to
more users over the next few weeks.

If your device is included in phase one of the rollout, you’ll
see the following patch when you check for updates:

Update for Removal of Adobe Flash Player for Windows 10 Version
20H2 for x64-based systems (KB4577586)

Windows 10 KB4577586

Or

Update for Removal of Adobe Flash Player for Windows 10 Version
2004 for x64-based systems (KB4577586).

Note that same KB (knowledgebase) number is used for all other
versions of the OS and build number is not affected.

Installing Windows 10 KB4577586

The update is downloaded and installed in less than five
minutes, and a reboot is required to finish the process. Once
done, you’ll see the KB highlighted on the Windows Update
history page and Control Panel.

Windows Update history

It’s also worth noting that the new Windows 10 update cannot be
‘uninstalled’ and you cannot restore Flash Player support.

However, Microsoft has already confirmed that some Flash
components may continue to reside on your computer via
third-party apps. According to a support
document, the patch is designed to remove Flash Player
installed by Microsoft only and it won’t affect any versions of
the software that have been installed by you manually.

In other words, Microsoft won’t remove the Flash Player version
that has been installed as part of a third-party app or browser
plugin.

Flash Player
Flash removed from Control Panel after patch

Microsoft has already disabled the Flash Player in its Edge
browser and Google Chrome was also updated to remove the
retired software, while Firefox got rid of it back in November
2020.

Flash Player’s farewell has been long in the making and it was
announced way back in 2017, so it’s advisable to remove all
Flash associated products manually as they will continue to
pose a security risk and your device could become vulnerable.

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