https://wccftech.com/windows-10-update-kb4566116-preview-is-out-for-v1909-and-v1903/

Image: Drew Angerer / AFP / GETTY Images

Following the monthly cumulative updates, Microsoft has today released another batch of Windows 10 updates tagged as "preview." These are optional, non-security updates that eventually become a part of the next month's mandatory Patch Tuesday updates.