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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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Installing Chrome OS Flex: A Step-by-Step Guide

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Developed by Google, Chrome OS Flex offers a streamlined and efficient experience, especially for devices with limited hardware capabilities. Here's a step-by-step guide to help you install Chrome OS Flex on your device.

Prerequisites

Before we begin, ensure you have the following:

- A USB flash drive with at least 8 GB of storage.

- A computer with an internet connection.

- A device you want to install Chrome OS Flex on 


 Visit the Chrome OS Flex official website and download the Chrome OS Flex installer.

Open the Chrome browser and install the Chromebook Recovery Utility extension from the Chrome Web Store.

Launch the Chromebook Recovery Utility.

   - Click on the gear icon in the top-right corner and select "Use local image."

   - Navigate to the location where you downloaded the Chrome OS Flex installer.

   - Insert your USB flash drive and select it from the list of devices.

   - Click "Continue" and then "Create now" to begin the process. This may take a few minutes.


Shut down the device you want to install Chrome OS Flex on.

   - Insert the bootable USB drive into the device.

Power on the device and immediately press the key to access the boot menu. This key varies by manufacturer (often F12, F2, ESC, or DEL). Refer to your device’s manual if you’re unsure.

In the boot menu, select your USB flash drive to boot from it. This will start the Chrome OS Flex installer.


Once booted from the USB drive, you'll see the Chrome OS Flex welcome screen. Click "Get Started."

You can choose to either "Try it first" or "Install CloudReady" (the underlying technology for Chrome OS Flex). If you want to explore Chrome OS Flex before committing, choose the try option. Otherwise, proceed with the installation.


If you choose to install, follow the on-screen instructions. You'll be prompted to erase your hard drive, so ensure you have backed up any important data.


The installation process will take a few minutes. Once complete, the device will restart automatically.

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