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Microsoft Warns of Windows Update Access Loss for Outdated Devices

Microsoft Warns of Windows Update Access Loss for Outdated Devices

First seen 9 Oct 2026, 12:39 UTC • •
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ThreatCluster AI
ThreatCluster •October 9, 2026 at 21:38 UTC
  • •Unsupported Windows versions will lose update access after May and June 2027.
  • •Specific security updates must be installed by various deadlines based on Windows version.
  • •Devices using WSUS are not affected by the certificate rotation.

Microsoft announced that devices running unsupported versions of Windows will lose access to security updates after the Windows Update certificate rotation in May and June 2027. Administrators must upgrade to supported versions of Windows to continue receiving updates, while unsupported versions will not receive any updates. Specific deadlines for required security updates vary by Windows version, with some needing updates by May 17, 2027, and others by June 19, 2027. Devices using Windows Server Update Services (WSUS) are exempt from this change. Microsoft urged IT administrators to identify outdated devices and create upgrade plans before the deadlines. The announcement emphasizes the importance of maintaining updated systems to ensure security.

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Timeline

2026-10-09
Microsoft announces update access changes
Microsoft warns that outdated Windows devices will lose access to updates after certificate expiration in 2027.
BleepingComputer
2026-10-09
Admin guidance issued
Microsoft advises IT admins to upgrade unsupported devices before the certificate expiration dates.
Feeds.4Sysops

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Common questions

What versions of Windows are affected?
Devices running unsupported versions of Windows will be affected and must be upgraded to continue receiving updates.
What are the deadlines for updates?
Specific security updates must be installed by May 17, 2027, or June 19, 2027, depending on the Windows version.
Are devices using WSUS affected?
No, devices that receive updates through Windows Server Update Services (WSUS) are not affected by the certificate rotation.