Create Bootable USB Flash Drive to Install Windows 10  

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  1. sportsfan148's Avatar
    Posts : 971
    Windows 10 Home 202H
       #440

    inwell said:
    If we are booting via UEFI mode,is it 100% sure that setup when automatically installs os ,it definitely creates GPT scheme and not MBR(coz i learnt that UEFI can use MBR disk) ( in brand new disk) ? At what point we will get to know if the setup is going mbr or gpt way ? After total installation is over ?
    Yes, if you boot from UEFI it will automatically set up GPT for your Windows 10 OS. Thats exactly the way I install Windows 10 so I know from my own experience. You will know its GPT when youre installation has finished. You can either check it in Disk Management or use Diskpart to check
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  2. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #441

    @inwell,
    If you boot the PC in UEFI mode, Windows Setup can ONLY install Windows 10 in UEFI mode. If your disk is MBR rather than GPT, you will see the following message:

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  3. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #442

    inwell said:
    At what point we will get to know if the setup is going mbr or gpt way ? After total installation is over ?
    When the installation is over, right-click on the Start button-->Windows PowerShell (Admin).
    Run the following commands (shown in red):

    CMD
    bcdedit | find "path"

    You will see the following:
    Code:
    C:\Windows\system32>bcdedit | find "path"
    
    path                  \EFI\Microsoft\Boot\bootmgfw.efi
    path                    \Windows\system32\winload.efi
    "EFI" denotes that Windows is running in UEFI mode, which requires GPT.
    You can't possibly install Windows in UEFI mode on an MBR disk.
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  4. inwell's Avatar
    Posts : 92
    Win10 Pro
       #443

    But when we purchase new drive, is it MBR always ? Or doesn't it have any scheme ?
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  5. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #444

    I believe (but am not sure) that a new disk is blank rather than MBR or GPT.
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  6. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #445

    You may use MiniTool Partition Wizard Home Edition to check whether your disk is blank, GPT, or MBR.
    I don't have a blank disk at hand.

    Create Bootable USB Flash Drive to Install Windows 10-gpt-vs-mbr.jpg
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  7. NavyLCDR's Avatar
    Posts : 15,515
    Windows 10 Pro
       #446

    Matthew Wai said:
    I believe (but am not sure) that a new disk is blank rather than MBR or GPT.
    Matthew Wai said:
    You may use MiniTool Partition Wizard Home Edition to check whether your disk is blank, GPT, or MBR.

    Create Bootable USB Flash Drive to Install Windows 10-gpt-vs-mbr.jpg
    A physical drive cannot be completely "blank". It has to be either MBR or GPT. Just because it is unallocated does not mean that it is "blank" as in neither MBR or GPT. Most brand new drives with no partitions defined on them are MBR.
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  8. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #447

    I stand corrected. Last time when I bought a brand-new disk, I used DiskPart to convert it to GPT without checking whether it was originally MBR or GPT.
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  9. inwell's Avatar
    Posts : 92
    Win10 Pro
       #448

    Matthew Wai said:
    @inwell,
    If you boot the PC in UEFI mode, Windows Setup can ONLY install Windows 10 in UEFI mode. If your disk is MBR rather than GPT, you will see the following message:

    Really ? It's very confusing 🙄. As i read online that UEFI supports MBR and GPT both .
      My Computers

  10. Matthew Wai's Avatar
    Posts : 5,085
    Windows 10 Home 20H2
       #449

    inwell said:
    UEFI supports MBR and GPT both .
    UEFI can access both MBR and GPT disks. It doesn't mean that Windows can be installed in UEFI mode on an MBR disk.
      My Computer


 
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