Windows Security Update: Why Your PC Needs a Checkup in 2026
For over a decade, a silent guardian has been protecting your Windows PC during startup – Secure Boot. This security feature, active by default on most computers since 2011, ensures only trusted software loads before Windows fully starts, shielding against vulnerabilities. But this foundational security element is facing a critical update, and ignoring it could leave your system vulnerable.
The Expiring Certificates: A First-Time Event
The original Secure Boot certificates, issued in 2011, are reaching the complete of their lifecycle and will begin expiring in June 2026. This marks the first time these certificates need renewal since the feature’s introduction. Microsoft is proactively addressing this, but understanding the implications is crucial for all Windows users.
What Happens When the Certificates Expire?
If your PC doesn’t receive the updated certificates by the expiration date, it will continue to function normally. Yet, it will enter a “degraded security state.” This means it will no longer receive critical security updates specifically for the boot process. This includes protections against new vulnerabilities discovered in the boot chain, potentially impacting features like BitLocker hardening and boot-level code integrity.
Over time, this lack of updates could create your system increasingly susceptible to sophisticated attacks. Older systems may encounter issues loading updated drivers or even future operating system versions.
Who Needs to Capture Action?
The good news is that most PCs purchased since 2024 already have the updated Secure Boot certificates. For those running supported versions of Windows 11, the new certificates will be automatically delivered through Windows Update. However, some PCs may require an additional firmware update from their manufacturer (OEM).
The situation is more critical for users of older systems, particularly those running Windows 10 or earlier. Microsoft is no longer providing updates for these operating systems, meaning they won’t receive the necessary certificate renewals. Microsoft encourages users on these older versions to upgrade to Windows 11 to maintain a secure system.
The Industry Collaboration Behind the Update
Refreshing these certificates isn’t a task Microsoft is tackling alone. It represents a large-scale coordinated effort across the entire Windows ecosystem, involving Windows servicing, firmware updates, and collaboration with hardware manufacturers worldwide. This collaborative approach aims to ensure a smooth transition for millions of devices.
What About Organizations?
For businesses and organizations managing multiple Windows devices, Microsoft recommends following their specific Secure Boot certificate update guidance. IT administrators have the option to manage the update process themselves using their preferred management tools.
FAQ: Secure Boot Certificate Expiration
Q: Will my computer stop working if the certificates expire?
No, your computer will still start and operate, but it will be in a less secure state.
Q: Do I need to do anything if I have a new computer?
If your computer was purchased after 2024, you likely don’t need to take any action.
Q: What if I have an older computer running Windows 10?
Microsoft recommends upgrading to Windows 11 to receive the updated certificates and maintain security.
Q: How will I know if my computer has the updated certificates?
Updates are delivered through Windows Update. Check for and install the latest updates.
Don’t wait until June 2026 to address this critical security update. Ensure your Windows PC is running a supported version of Windows and has the latest updates installed. Protecting your system from boot-level threats is a vital step in maintaining overall cybersecurity.
Learn more about Secure Boot and Windows security: Microsoft Support
