Hi @Shulman,
Welcome to Microsoft Q&A forum.
Thank you for reaching out. I understand that you encountered a "BOOT DEVICE NOT FOUND" error after your Microsoft 365 Family subscription was renewed.
To clarify the situation, the Microsoft 365 renewal and this boot error are almost certainly a coincidence. A subscription renewal is a billing event handled on Microsoft’s cloud servers and doesn't have the technical capability to alter your computer’s hardware settings or delete your operating system. This error typically points to a hardware communication issue, a BIOS setting change, or a failed Windows update that may have occurred during a background restart.
To help get your laptop back up and running, kindly follow the troubleshooting steps below:
- Perform a hard reset by unplug your charger and any USB devices. Press and hold the Power Button for 15–30 seconds. This drains residual power from the motherboard and can often resolve minor hardware hangs.
- Restore BIOS defaults:
- Turn the laptop on and immediately tap the BIOS key (usually F10, F2, or ESC, depending on your brand) until the settings menu appears.
- Look for an option to "Load Setup Defaults" (often the F9 key).
- Select "Save and Exit" (F10).
- Check drive detection: while in the BIOS, look under "System Information" or "Storage." If the Hard Drive or SSD is listed as "None" or "Not Detected" there may be a physical connection issue, or the drive may have failed.
If the problem persists after trying these troubleshooting steps, you also can contact Microsoft directly for assistance with your subscription or Windows installation. As a Microsoft 365 Personal/Family user, you have access to official support via the Microsoft Support Portal. To speak with a live person, type "Talk to an agent" in the search box, then click the "Contact Support" button at the bottom of the page to see chat or callback options.
I hope this helps clarify the situation and assists you in getting your device restored.
Please let me know if there is anything else I can do for you.