Microsoft: Unsupported Windows PCs Lose Updates in 2027
Microsoft says Windows Update certificates expire on May 17 and June 19, 2027, cutting off security updates for devices on unsupported Windows versions.
Microsoft has announced that Windows Update certificates will expire on May 17, 2027, and June 19, 2027. According to BleepingComputer, devices running unsupported versions of Windows will stop receiving security updates after the certificate rotation and will lose access to Windows Update services.
Replacement certificates have already been delivered to systems running a supported Windows version, Microsoft said. The company recommends that users upgrade to a supported version of Windows client or server.
Microsoft is advising IT administrators to identify devices running older or unsupported Windows versions before the rotation takes place. Administrators should also deploy monthly Windows updates on all supported devices and prepare an upgrade plan for unsupported ones.
The changes do not apply to devices that receive updates from Windows Server Update Services (WSUS).
Background
In October 2025, Microsoft released Windows 11, version 26H2, also known as the Windows 11 2026 Update, which is now generally available for eligible Windows 11 24H2 and 25H2 systems.
Quick answers
When will Windows Update certificates expire?
The certificates will expire on May 17, 2027, and June 19, 2027.
Will devices on unsupported Windows versions still receive security updates?
No. Microsoft says devices running unsupported versions of Windows will stop receiving security updates and will lose access to Windows Update services after the certificate rotation.
Do the certificate changes affect WSUS users?
No. The changes do not apply to devices that receive updates from Windows Server Update Services (WSUS).