Windows 10: Boot to UEFI Firmware Settings from inside Windows 10  

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  1.    22 May 2017 #20

    Hello Brink,
    Thanks for the tutorial. Meanwhile, many users will be using both SSD(s) and HDD(s)

    The SSD(s) may be based on MBR whereas the HDDs are using GPT.

    For example: I have 2 SSD's and multiple HDD's.
    The HDD's are all GPT and SSD's are MBR.

    Below you see the boot SSD containing reserved space and a recovery partition (created at the CU update)

    First of all: question is whether SSD can be changed from MBR to GPT without harm.
    (Any pros/cons)
    Secondly I assume that Windows needs to be re-installed from scratch.

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      My ComputerSystem Spec


  2. Posts : 23,658
    64-bit Windows 10 Pro build 16362
    Thread Starter
       22 May 2017 #21

    Hello @tfwul,

    It'll depend on if Windows was installed with UEFI or Legacy BIOS instead for the drive to be GPT or MBR respectively.

    If your motherboard supports UEFI and you have at least build 15063 or later installed, then Microsoft has a new tool below that you could use to convert Windows 10 from Legacy BIOS to UEFI without data loss.

    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss Windows 10 Installation Upgrade Tutorials
      My ComputersSystem Spec

  3.    22 May 2017 #22

    Brink said: View Post
    Hello @tfwul,

    It'll depend on if Windows was installed with UEFI or Legacy BIOS instead for the drive to be GPT or MBR respectively.

    If your motherboard supports UEFI and you have at least build 15063 or later installed, then Microsoft has a new tool below that you could use to convert Windows 10 from Legacy BIOS to UEFI without data loss.

    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss Windows 10 Installation Upgrade Tutorials
    Thanks @Brink

    Regretfully it is installed in 'Legacy BIOS-mode'.

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    Frankly, I looked over the screenshots I made during the setup, but I did not see an option to install it differently (=in UEFI mode).

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      My ComputerSystem Spec


  4. Posts : 23,658
    64-bit Windows 10 Pro build 16362
    Thread Starter
       22 May 2017 #23

    To install with UEFI, the installation media (ex: USB flash drive) would have needed to be created with UEFI as well.

    Create Bootable USB Flash Drive to Install Windows 10 Windows 10 Installation Upgrade Tutorials

    Luckily, you can use the tool from the tutorial I posted earlier to convert to UEFI if wanted without having to do anything else. That is if your motherboard has a UEFI firmware chip.
      My ComputersSystem Spec

  5.    22 May 2017 #24

    Thanks.
    In order not to make a mess asking questions about a different matter, I have posted my questions under
    "Convert Windows 10 from Legacy BIOS to UEFI without Data Loss Windows 10 Installation Upgrade Tutorials "
    obviously there is some overlapping, which please accept.
    =
      My ComputerSystem Spec


  6. Posts : 23,658
    64-bit Windows 10 Pro build 16362
    Thread Starter
       22 May 2017 #25



    No problem. I posted there.
      My ComputersSystem Spec

  7.    3 Weeks Ago #26

    This takes more time and more effort than simply restarting and waiting for the moment to spam the Delete or F2 buttons. This method requires the PC to restart twice. Why does this tutorial exist? ASUS has a utility which can restart directly from Windows into the UEFI in a single restart but this feature (the one detailed in this tutorial) seems totally pointless.
      My ComputerSystem Spec

  8.    3 Weeks Ago #27

    THX1138 said: View Post
    This takes more time and more effort than simply restarting and waiting for the moment to spam the Delete or F2 buttons. This method requires the PC to restart twice. Why does this tutorial exist? ASUS has a utility which can restart directly from Windows into the UEFI in a single restart but this feature (the one detailed in this tutorial) seems totally pointless.
    Not all devices have such facilities. On many, particularly with SSDs and fastboot enabled, spamming does not get you to bios as it boots too quick. Worse still, some devices are UEFI only, and legacy bios spamming does not work.
      My ComputerSystem Spec


  9. Posts : 23,658
    64-bit Windows 10 Pro build 16362
    Thread Starter
       3 Weeks Ago #28

    THX1138 said: View Post
    This takes more time and more effort than simply restarting and waiting for the moment to spam the Delete or F2 buttons. This method requires the PC to restart twice. Why does this tutorial exist? ASUS has a utility which can restart directly from Windows into the UEFI in a single restart but this feature (the one detailed in this tutorial) seems totally pointless.
    This tutorial exists to help make people aware of this option from within Windows 10 (if able) since it's not always as easy to do at boot.

    The multiple restarting you're referring to is referenced in Option 6 of the tutorial below instead. That's not what this tutorial is about since it's not from within Windows 10.

    Boot to Advanced Startup Options in Windows 10 Windows 10 Installation Upgrade Tutorials
      My ComputersSystem Spec


 
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