Windows 10 build 21242

Windows 10 build 21242 is the earliest build of Cobalt, the 21H2 development semester of Windows as a service. An issue related to this build was posted to GitHub by a Microsoft employee on 23 October 2020. It was mentioned a Feedback Hub quest relating to typing East Asian languages.

"OS Floor CO","Evaluates to true if client machine is running OS with build number 21242 and greater" "OS Ceiling FE Server","Evaluates to true if client machine is running OS with build number less than 21242"