Here is a complete guide to understanding this requirement, checking your system, and finding the necessary update links to get Photoshop running again. 1. Why Does Photoshop Require Version 1607?
While earlier releases like Photoshop 19.0 could still launch on older builds like 1511, the 19.1 update implemented a "hard block," triggering the now-famous error message if the OS version was lower than 1607. Common Friction Points Here is a complete guide to understanding this
Adobe Photoshop Requires Windows 10 Anniversary Update (Version 1607 or Later) checking your system