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Software·1 min read

Windows Update Certificates Expire in 2027: Old PCs at Risk

Microsoft is replacing Windows Update security certificates that expire on 17 May and 19 June 2027. PCs without the new ones will lose access to the service.

A Windows laptop showing the Windows Update screen with a security certificate warning icon.
Image: genbeta.com
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Microsoft has warned that some PCs running older versions of Windows could lose access to Windows Update in 2027. The company is renewing security certificates that expire on 17 May and 19 June, and machines that have not installed the new ones will no longer receive updates through the service.

According to Microsoft's official blog, these certificates verify that a device is connecting to genuine Windows Update servers. Like all certificates, they have an expiry date and must be replaced periodically. Most users on a supported version of Windows who keep their PC up to date will not need to do anything.

What each version needs

The requirements depend on the installed version. Windows 11 25H2 or later is already covered. Windows 11 24H2 needs at least the September 2025 security update. For other supported systems, including Windows Server 2022 and the versions of Windows 10 that still receive support, Microsoft requires the July 2026 update or later.

Some systems have less time. Devices running Windows 10 Enterprise 2019 LTSC, Windows Server 2019 and Windows Server 2016 must install the relevant updates before 17 May 2027 rather than 19 June. For versions that are no longer supported, Microsoft recommends moving to a supported system.

What actually happens

Older computers will not suddenly stop working. Affected machines will lose their connection to Windows Update, and with it the ability to receive updates through that service. Microsoft also clarified that the change does not affect devices that use Windows Server Update Services (WSUS), the tool used to distribute updates on business networks.

Windows 11 26H2 is now available for compatible devices running 24H2 and 25H2. Microsoft also advises IT administrators to check which machines still run older systems and to plan their upgrades before the certificates expire.

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Tags:microsoftwindows updatewindows 11certificateswsuswindows 10

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