Windows 10 build 19042.264

Windows 10 build 19042.264 is the earliest known build of Windows 10 October 2020 Update. Some references to a package called  are present in May 2020 Update build 19041.264, and if the package is present, the operating system will report itself as version 2009 and build 19042 instead of 2004 and 19041 respectively.