Microsoft warns that Windows devices running unsupported versions will stop receiving security updates. The reason is the replacement of the certificates Windows uses to verify it is talking to genuine Windows Update servers. Two sets of certificates will expire on May 17 and June 19, 2027, and devices without the replacement certificates will lose access to the service.
The notice was published on Thursday, October 8, through the Windows IT Pro Blog and the release health message center. According to Microsoft, replacement certificates have already been delivered to systems running a supported version of Windows and need nothing more if the device is up to date. Devices without the required patches will lose access to the service and will no longer receive security patches or feature updates.
What users need to do
The deadline depends on the version installed. Windows 11 version 25H2 and later need no action. Windows 11 24H2 and Windows Server 2025 must install the September 2025 security update or later before June 19, 2027. Other supported versions of Windows 11, Windows Server 2022 and Windows 10 must install the July 2026 security update or later by the same date. Windows 10 Enterprise 2019 LTSC, Windows Server 2019 and Windows Server 2016 have until May 17, 2027. For all other versions, Microsoft recommends upgrading to a supported release of Windows client or Windows Server.
Microsoft advises IT administrators to identify devices running older or unsupported versions, deploy monthly updates on all supported systems, and plan upgrades for devices that cannot be updated before May and June 2027. The change does not apply to devices that receive updates through Windows Server Update Services (WSUS), which downloads patches and distributes them across enterprise networks.
Meanwhile, Windows 11 26H2 is available as an enablement package, with a support cycle that restarts for Home and Pro editions. For users on older versions, the window to adapt closes within a few months.
No comments yet. Be the first!