Microsoft, Apple, Google, Mozilla, and even Adobe itself have all deprecated Adobe Flash technology, which reached end of life on January 1 of this year. This July, Microsoft is taking things one step further—KB4577586, aka Update for Removal of Adobe Flash Player, will become mandatory for all versions of Windows 10.
The update in question won’t remove third-party installations of the Flash player—only versions that have been bundled with Windows itself. The change seems unlikely to significantly impact most people—Microsoft Edge, Google Chrome, Mozilla Firefox, and Apple Safari each ended Flash support by January 1, 2021.