How to check your Windows PC for expiring security certificates - a big one ends in June
A critical expiration date for Secure Boot certificates is approaching in June 2026, affecting many Windows and Linux PCs. Microsoft has been coordinating with hardware partners to ensure that devices can transition to updated certificates. Users are advised to check for firmware updates to maintain security and functionality.
- ▪Secure Boot protects modern Windows and Linux PCs.
- ▪Microsoft Secure Boot certificates from 2011 expire in June 2026.
- ▪Most PC owners are fine if they install the latest updates.
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Tech Home Tech Security How to check your Windows PC for expiring security certificates - a big one ends in June A critical Windows expiration date is coming next month for more than a billion PCs - and even some Linux distros are affected. Is your PC ready? Written by Ed Bott, Senior Contributing EditorSenior Contributing Editor May 18, 2026 at 7:45 a.m. PT Elyse Betters Picaro / ZDNETFollow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways Secure Boot protects modern Windows and Linux PCs.Microsoft Secure Boot certificates from 2011 expire in June 2026.Most PC owners are fine if they install the latest updates.Last year's end-of-support deadline for Windows 10 was a big test for consumers and IT pros alike.
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