Windows 10: Install from D Drive? Solved

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  1. Bree's Avatar
    Posts : 8,551
    10 Home x64 (1803) (10 Pro on 2nd pc)
       26 Jun 2017 #11

    NavyLCDR said: View Post
    The diskpart commands take less than a minute to do.
    Yes, and that's my preferred method (and I did say that you could do it this way). But some people are less comfortable using command prompt than you or I, the 'create a recovery drive' method can be used by anyone, regardless of technical skills.
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  2.    26 Jun 2017 #12

    Bree said: View Post
    Yes, and that's my preferred method. But some people are less comfortable using command prompt than you or I, the 'create a recovery drive' method can be used by anyone, regardless of technical skills.
    It's just that a lot of people are making it sound like there is something special that has to be done to a flash drive to make it bootable, and that just isn't true. All that is required for both UEFI and legacy BIOS computers regarding the flash drive is a FAT32 primary partition marked as active. It is the files contained in the ISO file that make the flash drive bootable - not any secret, difficult or hidden code embedded on the flash drive.

    swarfega said: View Post
    No, you can't just copy the ISO, you have to use a program called Rufus to set up a bootable option.
    Bree said: View Post
    but for Legacy BIOS systems the USB's partition must be marked Active. This can be tricky for most USBs as they don't have (or need) a MBR (master boot record).
    These two posts, for example, make it sound like there is some magic trick to it. And there really is not.
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  3. Bree's Avatar
    Posts : 8,551
    10 Home x64 (1803) (10 Pro on 2nd pc)
       26 Jun 2017 #13

    NavyLCDR said: View Post
    These two posts, for example, make it sound like there is some magic trick to it. And there really is not.
    Not a magic trick, but a genuine stumbling block for those without the necessary knowledge. USBs often come supplied ready-formatted without using a MBR. Such USBs cannot be marked Active in Disk Management, even if you reformat them. Only Diskpart can create an Active partiton.
      My ComputersSystem Spec

  4.    26 Jun 2017 #14

    Actually one can clean install from a mounted ISO by running setup from the sources folder. It will create a windows.old as well.
      My ComputerSystem Spec

  5.    26 Jun 2017 #15

    Superfly said: View Post
    Actually one can clean install from a mounted ISO by running setup from the sources folder. It will create a windows.old as well.
    But doesn't that only work when run from a WINPE environment? For example, let's say I want to dual boot Windows 10 Home and Pro. I have a full install of Windows 10 Home and an empty NTFS partition (or unallocated space) reserved for Windows 10 Pro. To my knowledge, I cannot run setup.exe from within Windows 10 Home to do a clean install of Windows 10 Pro to the space I have reserved for it. I can format the partition as NTFS, use DISM to apply the Windows 10 Pro image from install.wim to it, and use BCDBOOT to add it to the boot menu, but I don't think I can do the install with setup.exe without booting into a WINPE environment.
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  6.    26 Jun 2017 #16

    NavyLCDR said: View Post
    But doesn't that only work when run from a WINPE environment? For example, let's say I want to dual boot Windows 10 Home and Pro. I have a full install of Windows 10 Home and an empty NTFS partition (or unallocated space) reserved for Windows 10 Pro. To my knowledge, I cannot run setup.exe from within Windows 10 Home to do a clean install of Windows 10 Pro to the space I have reserved for it. I can format the partition as NTFS, use DISM to apply the Windows 10 Pro image from install.wim to it, and use BCDBOOT to add it to the boot menu, but I don't think I can do the install with setup.exe without booting into a WINPE environment.
    Nope, no need for WinPE - I have done it this way many times...try it and see....
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  7.    26 Jun 2017 #17

    Hi,
    @Superfly : Yes, that works just fine.

    Using a USB drive you can make it bootable for BIOS and UEFI using Bcdedit, all else can easily be done using Diskmanagement.

    Code:
    bcdboot C:\Windows /s S: /f ALL
    Replace S: with the drive letter of the USB drive.

    Prior to using MR's Rescue media I often kept a few USB sticks that were made bootable like this to repair unbootabe Windows installs.

    Cheers,
      My ComputersSystem Spec


  8. Posts : 65
    Windows 10 Home Anniversary 64bit
    Thread Starter
       26 Jun 2017 #18

    Superfly said: View Post
    Actually one can clean install from a mounted ISO by running setup from the sources folder. It will create a windows.old as well.
    So are you saying I can mount the iso that's on my D Drive and install?
      My ComputerSystem Spec

  9.    26 Jun 2017 #19

    Deblk said: View Post
    So are you saying I can mount the iso that's on my D Drive and install?
    What would you mount it with?
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  10. Posts : 65
    Windows 10 Home Anniversary 64bit
    Thread Starter
       26 Jun 2017 #20

    NavyLCDR said: View Post
    What would you mount it with?
    Because I already have Windows 10 I can mount through explorer
      My ComputerSystem Spec


 
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