Update!
In my recent post, https://deploymentbunny.com/2026/04/07/secure-boot-2026-essential-updates-and-fixes/, I referenced the CheckSecureBoot script used to validate Secure Boot configuration during deployment. The purpose of the script is to be able to check the satus of the upcoming changes for the Secure Boot Certificate issue that will happen in the summer of 2026.
I just want to give a quick heads‑up that the script has now been updated.
The update improves detection logic and includes some refinements based on recent testing and community feedback. If you’re using this script in your deployment workflows, I strongly recommend grabbing the latest version.
- Script location:
https://github.com/DeploymentBunny/Files/tree/master/Tools/CheckSecureBoot - What’s new:
Full details about the changes are documented here:
https://github.com/DeploymentBunny/Files/blob/master/Tools/CheckSecureBoot/README.md - New name:
Not important, but the new name is Check-SecureBoot.ps1 - New Switch:
-Silent, no output, instead it stores the data in .log and .json files - Log Location:
Now it defaults to %TEMP\SecureBoot-Diagnostics - Recomendations:
When running in a normal mode it will tell you in plain english what you need to do
As always, feedback is welcome
Until next time
/DeploymentBunny
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Categories: Security, UEFI, Windows 10, windows 11, Windows Server
The Deployment Bunny 
I’d just like to point out that you have readers all over the world. For some of us, these changes are happening in Winter of 2026.
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The first certs will expire in june and some will expire a bit later, it has nothing to do where you are located in the world as far as I understand, it is related to the install date of your computer, but I am very happy to know that I have followers around the globe!
Thank you!🙏
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But you said summer.
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Yep, I know, June is winter in sime parts of the world, and summer in other parts, so if we remove Summer and Wintet it will be beginning of June 2026, regardless if you define that as summer or winter.
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