Windows 8 and 8.1 Forums

UEFI

  1. #1


    MD
    Posts : 865
    Windows 10 Pro x 64

    UEFI


    Please help me understand how to boot from my usb or dvd with UEFI.

    I think I enable csm under boot then got to security and disable secure boot.

    Then I get lost.
    Should I save and exit then go back to UEFI settings and select my new device and hit enter to boot or should this have been done earlier before the first save and exit?

      My System SpecsSystem Spec

  2. #2


    Posts : 22,582
    64-bit Windows 10


    Hello Peter,

    If you have not already, the USB would need to be created for UEFI.
    Afterwards, I like to boot to my motherboard's boot menu, and select to temporarily boot from the UEFI USB.

    Hope this helps.
      My System SpecsSystem Spec

  3. #3


    MD
    Posts : 865
    Windows 10 Pro x 64


    HI Brink
    I think I am asking how to use UEFI to boot anything. For example suppose I have a dvd I want to boot from. After enabling csm and disabling secure boot, what is the next step to allow the disc to boot just like it used to with F12.
    This is of course without legacy.

    I think with legacy, once you click on it, you can boot as you used to with f12.

    So my question is what to do to boot from a dvd after csm and secure boot are attended to?

    Thank you - Peter
    peter
      My System SpecsSystem Spec

  4. #4


    Posts : 22,582
    64-bit Windows 10


    For me at least, when I boot to the boot menu, I have two options to select from to boot to the UEFI USB or normal (non UEFI) USB for the same USB flash drive.
      My System SpecsSystem Spec

  5. #5


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by Brink View Post
    For me at least, when I boot to the boot menu, I have two options to select from to boot to the UEFI USB or normal (non UEFI) USB for the same USB flash drive.
    Same here. My USB thumb drive shows up twice in the boot list. Once with UEFI in the description and once without it. I can then select to boot it up in UEFI mode of not. That's without changing any of the BIOS UEFI settings. I haven't tried booting from a CD of DVD though. I would imagine if the disk didn't support booting in UEFI mode it wouldn't be listed with UEFI in the description. The only reason I can think of to change the BIOS UEFI settings (IE turn it off), is to install an OS that doesn't support UEFI. I am by no means an expert on UEFI though.
      My System SpecsSystem Spec

  6. #6


    South Coast NSW, Australia
    Posts : 615
    Windows 8.1 'Ultimate' RTM 64 bit (Pro/WMC).


    The best thing about UEFI is that none of my machines are so equipped.

    I dislike it, and the motives behind it, intensely. I had intended to upgrade this laptop early next year, but am not happy about being forced to accept UEFI, so may not bother to upgrade at all. This machine still has plenty of life in it before it's obsolete.


    Wenda.
      My System SpecsSystem Spec

  7. #7


    MD
    Posts : 865
    Windows 10 Pro x 64

    disc not usb


    I see where most of the discussion is about usb.
    I was thinking if I inserted my OS disc and needed to boot from it.
    What do after I disable secure boot and enable csm?

    Wenda - I think a lot of people agree with you. Without legacy, and even with it, for an unskilled user like me it is a hardship.

    I am asking b/c I was thinking of upgrading but the tutorials I have watched do not tell you what I am asking.

    How do you boot with an OS disc with UEFI after you disable secure boot and enable csm?
      My System SpecsSystem Spec

  8. #8


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by Peter2 View Post
    How do you boot with an OS disc with UEFI after you disable secure boot and enable csm?
    The same way you normally do I would think, select the Boot option with UEFI in front of it form the boot menu.
      My System SpecsSystem Spec

  9. #9


    MD
    Posts : 865
    Windows 10 Pro x 64


    I have to play with this more.
    Thank you for your help.
      My System SpecsSystem Spec

  10. #10


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    I only have one PC with UEFI, my laptop. Being a laptop, it has very basic BIOS options and is limited in what you can change. I only have a very basic understanding of UEFI and how it works. The few times I've done installs on it, I just left it at the factory settings as I'm running Windows 8.1 on it.
      My System SpecsSystem Spec

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