Microsoft Says Outdated Windows PCs Will Lose Windows Update Access When Certificates Expire in 2027

Microsoft has warned that Windows devices running unsupported versions, or supported versions that are missing recent patches, will lose access to Windows Update when a set of Windows Update certificates expires on May 17, 2027 and June 19, 2027. The notice was published in the Windows release health message center on Thursday, with a matching entry in the Microsoft 365 Message Center (MC1491763). Affected devices "will lose access to Windows Update services and won't receive any updates as a re