https://wccftech.com/windows-10-update-kb5006738-preview-is-now-available/ > Image: Drew Angerer / AFP / GETTY Images > Microsoft has released October 2021 optional updates for all supported versions of Windows 10. Build 19041.1320 is available for version 2004, 19042.1320 for version 20H2, and 19043.1320 "preview" is out for version 21H1. Some of the highlights of today's non-security update include: