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Tom’s Guide
Tom’s Guide
Technology
Jason England

Windows 10 users warned to upgrade now or risk a ‘degraded security state’ as Microsoft ends Secure Boot support

Windows 10 logo on laptop.

Support for Windows 10 ended officially in October 2025, and while over 60% of PC users have made the switch to Windows 11, 35% are still using the older OS. Look, I get that it’s tricky to break an old habit, but for those users, this has become a significant security concern.

In a new blog post, Microsoft has announced a “generational refresh” of Secure Boot certificates, which means the current ones are set to expire in late June.

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