By Zak Doffman, Contributor
Publication Date: 2026-05-26 06:45:00
The deadline is almost here. After 15 years, Microsoft will start expiring Secure Boot certificates on most PCs in June. That’s next week. While users had been told to expect a one-time additional restart, that advice now is different. You will likely need to “restart multiple times” to ensure your PC is secure.
The Secure Boot certificates on all PCs from pre-2023 date back to 2011, when these were initially released. Microsoft is expiring certificates for the first time and issuing new ones. All this is wrapped into April and May security updates.
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Per Windows Latest, “Microsoft has revealed what happens to Windows 11 PCs if you ignore the Secure Boot deadline in June 2026.” TL;DR, the website says, “your system security will permanently degrade because Microsoft will stop sending boot-critical updates and malware blacklists (DBX revocation lists).”
Windows will likely “restart…
