Help Net Security2026-10-12 07:39:50

Windows PCs missing key updates could lose security fixes in 2027

Microsoft is advising users and businesses to update Windows devices before digital certificates used to verify Windows Update servers expire in May and June 2027.

Summary

The certificates expire on May 17 or June 19, depending on the Windows version. Devices without replacement certificates will lose access to Windows Update, including security fixes delivered through the service. Microsoft is distributing the replacements through a process known as certificate rotation.

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This is a brief wire summary, the full story (linked below) has the complete details.

KazaSec's take

Stories like this are part of why proactive security testing exists, finding the gap before someone else does is always cheaper than responding after the fact.

Coverage details

Source: Help Net Security
Published: 2026-10-12 07:39:50
Author: anamarija pogorelec
Category: technology

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