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How to fix windows BIOS boot manager - lenovo 5 pro - failed

MNK 5 Reputation points
2026-02-23T20:52:01.0666667+00:00

the BIOS reboot failed.

I have followed all the options e.g turning on and off - pressing F2, F8. I can get to the ideapad start menu and my boot tabs include UEFI and enabled.

I have downloaded onto a USB drive the recommended reboot files or same.

There are no options to change details outside of the start menu; enter command prompts or same.

Outside of the start menu - I go round in circles from 3 options:

1 Setup Notice: default boot device missing or boot failed. Insert recovery Media and hit any key. Then select Boot Manager to choose a new boot device or to boot recovery media. would you like to continue. OK

Plugged in USB drive before pressing OK.

2 Windows Boot Manager (WDC PC etc......)

clicked on this option (only option)

3 Set up notice: windows boot manager has been blocked by the current security policy. would you like to continue? OK

clicked ok

It goes back to screen 2.

HELP!

Windows for home | Windows 11 | Devices and drivers
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  1. CCC22 0 Reputation points
    2026-03-31T11:06:33.81+00:00
    1. turn off laptop
    2. turn on laptop while holding f2
    3. turn off Safe Booting (or something like that idk the exact name)
    4. save and exit

    your laptop should now be able to start again.

    I had the same problem, this fixed it for now.

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  2. AI answer

    2026-02-23T20:52:14.5933333+00:00

    To address the issue with the Windows BIOS Boot Manager on your Lenovo 5 Pro, you can follow these troubleshooting steps:

    1. Check Boot Order: Access the BIOS/UEFI settings by pressing the appropriate key (often F2 or F12) during startup. Ensure that your USB drive is set as the first boot device. This can usually be found under the Boot tab.
    2. Disable Secure Boot: If you are encountering a message that Windows Boot Manager has been blocked by the current security policy, you may need to disable Secure Boot. This option is typically found in the Security tab of the BIOS settings. After disabling it, save the changes and exit.
    3. Use Recovery Media: Since you have a USB drive with the recovery files, ensure it is properly formatted and contains the correct recovery media. You might need to create a bootable USB drive using Windows Media Creation Tool if it’s not working.
    4. Reset BIOS to Default: If the above steps do not resolve the issue, consider resetting the BIOS settings to default. This option is usually available in the BIOS menu.
    5. Check Hardware Connections: Ensure that all hardware components, especially the hard drive, are properly connected. Sometimes, reseating the components can resolve boot issues.
    6. Contact Support: If the problem persists, it may be beneficial to contact Lenovo support for further assistance, especially if the device is still under warranty.

    These steps should help you troubleshoot the boot manager issue on your Lenovo device.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  3. MNK 5 Reputation points
    2026-02-23T21:37:02.1866667+00:00

    i ended up turning off all my security keys

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