Microsoft is installing a Windows 10 update that removes the embedded 32-bit version of Adobe Flash Player from the operating system.
In October, we reported that Microsoft released the KB4577586 optional update to remove the embedded 32-bit Flash Player from Windows and prevent it from being reinstalled.
This update was only available in the Microsoft Catalog, and once installed, it could not be removed. This update is an end to built-in Flash in the Windows 10, Windows 8, and Windows Server operating systems.
As of yesterday, Microsoft has released the update “Update for Removing Adobe Flash Player for Windows 10 (KB4577586)” via Windows Update as an optional update.
IMPORTANT As part of Adobe Flash support, KB4577586 is now available as an optional update for Windows Update (WU) and Windows Server Update Services (WSUS). Installing KB4577586 permanently removes Adobe Flash Player from your Windows device. After installing it, you will not be able to uninstall KB4577586. See Adobe Flash Player Update End of Support for more details about Microsoft’s plans.
However, in our tests, the update is installed automatically without your permission and without your first request.
Once installed, the KB4577586 update will be listed under ‘Other updates’ in the ‘View update history’ section, as shown below.
BleepingComputer contacted Microsoft to confirm if the automatic installation of the update was a bug, but did not hear it.