Windows 10 update incorrectly tells some users they've reached end-of-life, despite having extended support — Microsoft confirms message sent to Enterprise, Pro, and Education users in error

Windows Update.

Microsoft officially ended mainstream support for Windows 10 last month, nudging users to upgrade to Windows 11. While that led to almost an overnight technological revolution in Japan, elsewhere, it has caused a lot of confusion. Certain versions of Windows 10, like Enterprise LTSC — and those enrolled in the ESU program — are still scheduled to receive security updates through at least 2027, but they're starting to see out-of-support messages in Settings.

Windows 10 LTSC 2021 End of life? What the hell, Microsoft? from r/sysadmin