https://www.bleepingcomputer.com/news/microsoft/microsoft-windows-kb5017383-preview-update-added-to-wsus-by-mistake/ > Microsoft says that KB5017383, this month's Windows preview update, has been accidentally listed in Windows Server Update Services (WSUS) and may lead to security update install problems in some managed environments. > The issue is that while WSUS allows admins to deploy the latest Microsoft product updates in enterprise environments, non-security preview releases (aka 'C' releases) are updates designed to help test bug fixes and improvements that will roll out in production the following month.