Windows 10: Laptop. Windows 10, Trying to install W7. MBR / GPT issue

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  1.    27 May 2016 #11

    cereberus said: View Post
    Windows 7 can be installed on uefi pc but you need to turn off secure boot.
    Sorry for the confusion. I just my W10 back.

    I've got a functioning W10 on an External HDD.

    The internal one is set to read-only, and it's not about administrator rights.

    I think it has to do with the fact it has some residue of boot files; Paragon Hard Disk Manager detects an OS there (internal), and DISKPART can't format or do anything about it, actually. Click image for larger version. 

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      My ComputerSystem Spec

  2.    27 May 2016 #12

    I am confused now. Let's get back to basics.

    1) Are you trying to install windows 10 or 7.

    2) you cannot just clone a windows to go drive to an internal drive to install windows 10 as it will not boot properly.

    3) you need a usb flash drive or dvd to install windows on a pc.

    4) you may need to nuke existing internal drive using diskpart clean command or a tool like dban in some cases.
      My ComputerSystem Spec

  3.    27 May 2016 #13

    Use Windows PE
    Not Windows To Go (which is Locking the internal disk)

    use any one of my Bootable PE Rescue Disks...
      My ComputerSystem Spec

  4.    27 May 2016 #14

    Kyhi said: View Post
    FIRST, create a recovery drive or system image of the current system..
    Either via control panel > recovery > create a recovery drive
    or via an OEM Utility...
    As once you go messing around - you will want to have saved the current and working factory OS Image,,,

    Second you will have to boot from an external device to gain access to the internal disk..
    Bootable PE Rescue in my sig below..

    Then you can clean, convert and repartition the current HDD, then apply the win7 image..

    then you can reboot and hope winows 7 activates and can find the need drivers for your Newer PC hardware..
    As stated before.........
      My ComputerSystem Spec

  5.    27 May 2016 #15

    OK, so I solved everything. For future viewers, I'll explain what solutions I used:

    Problem: Wanted to Install W7 on a new laptop.
    Solution: Don't. It's better of to get used to W10 and solve its problems.

    P: Wanted to boot from external HDD
    S: startup settings - uefi - secure boot = disabled, boot = legacy, boot order = external HDD

    Problem: Deleted system partition when my only hope was a W10 ISO in an external HDD
    Solution: WinToUSB

    P: Once booted from external HDD, I wanted to copy the OS to a local HDD
    S: Paragon Hard Disk Manager (migrate OS)

    P: Internal HDD was read-only
    S: in DISKPART, attributes disk clear readonly

    P: Couldn't boot to uefi settings to change the boot order again
    S: Internal OS disk needs to be GPT and not MBR.
    In DISKPART: convert gpt
    Here are the relevant DISKPART commands I used. DON'T USE THEM ALL, it's just a collection:

    list disk
    select disk []
    detail disk
    online disk
    select volume []
    detail volume
    create partition primary
    select partition 1
    active (only works when disk is MBR)
    format fs=ntfs quick
    convert mbr / gpt
    attributes disk clear readonly
    Hope that helps.
      My ComputerSystem Spec

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