If you’re one of the latter, don’t go clicking Windows Update’s “Check for updates” button willy-nilly, or you may unwittingly join the ranks of the Windows pioneers—even if you were simply hoping for a patch to fix a problem with your operating system.
In a blog post this week, Microsoft revealed that those users who click the “Check for updates” button (
Settings > Update & Security > Windows Update) are opted in to testing new Windows features on a one-time basis, if they happen to click the button during the third and fourth week of the month. Microsoft calls those updates “C” and “D” releases, and issues them to those who are “seeking” them when they click the update button.
Link:
https://www.pcworld.com/article/332...or-updates-button-may-download-beta-code.html