Windows 10: How to switch from LEGACY to UEFI and turn on Secure Boot without reinstalling Windows.

Discus and support How to switch from LEGACY to UEFI and turn on Secure Boot without reinstalling Windows. in Windows 10 BSOD Crashes and Debugging to solve the problem; I am struggling to switch for UEFI from Legacy. But I have questions. Here they are,1. How to convert my boot disk for GPT from MBR without losing any... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by Sandas Sathsindu, Jun 29, 2021.

  1. SANDAS SATHSINDU
    Sandas Sathsindu Win User

    How to switch from LEGACY to UEFI and turn on Secure Boot without reinstalling Windows.


    I am struggling to switch for UEFI from Legacy. But I have questions. Here they are,1. How to convert my boot disk for GPT from MBR without losing any data.2. Think I converted my disks for GPT while all the Windows processes going on. What will happen?3. Then I shut down my computer and turn it on again.4. How to switch UEFI after the first boot after switching for GPT without reinstalling?5. Will the Secure Boot option available after I switched to UEFI. My current OS - Windows 10Motherboard - Gigabyte Gaming B8-CFGraphics - Nvidia GTX 1050 TiCPU - Intel i3 7th gen 3.90GHzDo someone has Expe

    :)
     
    Sandas Sathsindu, Jun 29, 2021
    #1
  2. DAMN_SMOOTH
    Damn_Smooth Win User

    Windows 8 Secure Boot Feature: Not So Secure?

    So Linux is switching to secure boot also? Or they have to because of UEFI?
     
    Damn_Smooth, Jun 29, 2021
    #2
  3. NEWTEKIE1
    newtekie1 Win User
    Windows 8 Secure Boot Feature: Not So Secure?

    • Linux
    • Linux
    • Linux
    • Linux
    • Oh and OSX
    Here is a statement from a Kernal Developer at Red Hat:

    I'm not sure this exploits the legacy BIOS but rather it exploits the legacy boot method on MBR drives, injecting a signed key before the OS boots, which you are correct in that it has nothing to do with Windows 8. And the simplest fix would just be to require boot drives use GPT when Secure Boot is enabled in UEFI.
     
    newtekie1, Jun 29, 2021
    #3
  4. DNSBOB
    dnsbob Win User

    How to switch from LEGACY to UEFI and turn on Secure Boot without reinstalling Windows.

    Need to convert Windows 8.1 from UEFI boot to legacy boot

    I have switched the boot mode from UEFI to Legacy. Is there a way to change the existing Windows 8.1 to boot in Legacy mode, or do I need to reinstall Windows?

    (I dual-boot Windows and Linux on all my PC's. I have a Toshiba Sattelite that refuses to boot Linux in UEFI mode (tried Debian, Fedora, Suse, and Arch, with various workarounds, secure boot is disabled). As a last resort I switched to Legacy boot mode.
    Linux boots fine in Legacy mode, but now Windows will not boot.)
     
    dnsbob, Jun 29, 2021
    #4
Thema:

How to switch from LEGACY to UEFI and turn on Secure Boot without reinstalling Windows.

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