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Windows won't start if I switch to UEFI mode.

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Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention   -  
Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention   -

Hello,

In order to meet the necessary conditions for migrating from W10 to W11, I attempted to switch the boot mode from "legacy" to "UEFI" on my Dell PC.

Now, W10 won't start except in safe mode.

How can I resolve this issue?

If someone can help me, I would be grateful.

Best regards

6 answers

  2.
    Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention  
     

    Hello and thank you fabul...and Flo 88

    I will try and possibly come back to the Forum.

    Best regards

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    1. Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention  
       

      Hello,

      I'm a donkey!

      I wanted to make it easier to switch from W10 to W11 by following the method here: https://www.youtube.com/watch?v=kgZuVSxVTi8.

      But at the end of the installation, I'm faced with an error message on a black screen: "A disk read error occurred - Press Ctrl+Alt+Del to restart."

      I did the manipulation but nothing happens.

      I turned off the PC using the "Power" button, and the same message appeared.

      I changed my wireless keyboard for a wired one connected to the "Keyboard" port with no effect.

      So my PC is stuck.

      Do you have any idea what I should do? I should mention that it's a Dell and I'm contacting you from another laptop.

      Thank you in advance,

      Best regards,

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  3. flo88 Posted messages 28491 Registration date   Status Contributor Last intervention   Ambassadeur 5 170
     

    Hello

    Try switching the BIOS to UEFI, maybe this time it will boot in UEFI.

    (hello @fabul StatusModerator ;-) )

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  4. Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention  
     

    Hello,

    I am now arriving at a message:

    No Bootable devices found

    F1 Key to retry boot. Done without result

    F2 key for setup Utility:

    F5 key to run onboard diagnostics: Done without detecting any problems

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  6. Winux
     

    Hello,

    Well, I think you're going to have to install Windows 11 from scratch.

    If you want to check the status of your partitions, use a liveUSB Hiren's Boot CD.

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  7. Bubbledom13 Posted messages 31 Registration date   Status Member Last intervention  
     

    Hello,

    Thank you all for your responses.

    It ended up with a professional repairer who has a storefront and who did it very well.

    Clearly, I wasn't up to the task!

    Best regards,

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