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The June 2026 Secure Boot Certificate Expiry: What You Need to Know

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If you dual-boot or run a Linux distribution with Secure Boot enabled, you may have heard about a major security deadline. The original Microsoft 2011 UEFI Third-Party Certificate Authority (CA) keys, which most Linux distributions rely on to sign their initial bootloaders (shim) on consumer PC hardware, expired at the end of June 2026 The expiration of a certificate doesn't invalidate already-installed, signed binaries on your system; firmware doesn't check expiration dates at boot time. However, moving forward, future Linux bootloader updates and security patches will be signed exclusively using the new Windows UEFI CA 2023 key . If your motherboard's firmware database isn't updated to trust this new 2023 key, your Linux system may eventually experience package management blocks or fail to apply critical bootloader updates. Before running updates, check if Secure Boot is active and see if your system already recognizes the 2023 certificate hierarchy. Open your termi...
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Unlock The Bootloader on Windows Phone

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Download windows phone internals and read the instructions. You might want to download windows device recovery tool from the windows phone internals app too 


Navigate to unlock bootloader and tap on  download all 




This will download two files , one for your device and possibly another ffu of the Lumia 950XL as well as the emergency files 

Note: don't try to unlock bootloader without emergency files. Also you might want to remove any sdcard 



Follow the prompts to boot the phone into flash mode






Enable 'show hidden files' in windows file explorer, the files you downloaded will be in C:\ProgramData\WPinternals\Repository

Tap on unlock and make a coffee etc, just don't touch the phone or exit wpinternals.

You can also flash the stock ffu at any time as well 

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