Members Windows 10 LTSC 2021 complain about false messages about the end of support

Panic erupted among system administrators after some machines with Windows 10 LTSC 2021 a message started appearing in the update center Windows, stating that the system withdrew from support, and offering buy Extended Security Updates (ESU)This caused confusion: the official support period for LTSC 2021 is until January 2027.

The situation is being actively discussed in professional communities, including r/sysadmin on RedditOne user pointed out that the update KB5066791, released recently, may be the cause of the notification. Rolling back this update removes the message, suggesting temporary error or a deliberate attempt to exert pressure on LTSC users.

Microsoft has already responded. As it turned out on October 16, when reinstalling the problematic update on the same system the message no longer appearsThis suggests that the company promptly changed the behavior of the patch or the server-side update. Wireshark tests also confirmed: the update service is working correctly, and LTSC continues to receive updates from the online catalog.

Until Microsoft releases an official statement regarding the failure, IT specialists advise temporarily avoid direct connection of LTSC clients to Microsoft updates and use local solutions like WSUS or ConfigMgr. Most alerts are reported on machines directly connected to the internet without centralized management.