After latest Win 11 - Boot Partition is failing - boot says reboot and select proper boot device or insert boot media and select device

C Tak 0 Reputation points
2026-06-25T23:33:20.59+00:00

Hello

Acer All in One - Running Windows 11. 500 Gig Drive.

I have tried to do the repair off of a USB and it will not allow me even run the menu. I have ensure that the bios goes to the USB and it does however, I am unable to run the utility.

The disk seems to be compromised and I am not sure of the next move other than reinstalling. Please let me know the process to uninstall this update ... even though I am not able to get to a windows screen?

Please advise!

C Tak

Windows for home | Windows 11 | Windows update

1 answer

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  1. Carl-L 20,835 Reputation points Microsoft External Staff Moderator
    2026-06-26T09:35:46.5866667+00:00

    Hello C Tak,

    Welcome to Microsoft Q&A forum.

    Before we proceed, you said that you have changed the boot order to the USB. May I know if the error message came out any different?

    Also, this usually happen when a boot file is missing, which is not something a normal OS update will change. May I know if the issue appears right away after the update?

    I'm waiting for your reply.

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