Dedoimedo tried to upgrade Windows 10 Professional Edition Build 1909 to 20H2.
Windows 10 upgrade - Build 1909 to 20H2 - Not fun
Article and rant discussing an upgrade of Windows 10 Professional Edition Build 1909 to 20H2 on a serious-usage system, covering update process and speed, many unwarranted changes to various settings and tweaks, expired signatures for Defender AV services, file association nudges, headerbar messages, Office reactivation, explorer crash, CPU usage spikes, other bugs, annoyances and inconsistencies, and more.
