1.    10 Mar 2017 #1
    Join Date : Jun 2014
    Posts : 540
    Microsoft Windows 10 Pro 64-bit

    Install Windows 7 with a Win10 PE


    I have a computer that came with Windows 8, I currently have it upgraded to Windows 10. I want to install Windows 7.

    It's a Acer desktop and in their infinite wisdom decided to blacklist the Win 7 installer in the BIOS

    Now I could downgrade the BIOS to an earlier version and get the win 7 installer to work but I am very Leary of doing this.

    I was wondering if it is possible to use the Windows 10 installer to install Win 7. From what I have read once Win 7 is installed it will work fine.
      My ComputerSystem Spec
  2.    10 Mar 2017 #2
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,408
    Windows 10 IoT

    Define "blacklist"? Installing Windows 7 may be as easy as just turning off secure boot in the BIOS.
      My ComputerSystem Spec
  3.    10 Mar 2017 #3
    Join Date : Jul 2015
    Posts : 9,337
    Windows 10 Pro

    Quote Originally Posted by alphanumeric View Post
    Define "blacklist"? Installing Windows 7 may be as easy as just turning off secure boot in the BIOS.
    That's probably it, in which case, wouldn't Secure Boot need to be turned off anyway to get Windows 7 to boot after it was installed? I don't think Windows 7 supports Secure Boot in any way shape or form, before or after installed.
      My ComputerSystem Spec
  4.    10 Mar 2017 #4
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,408
    Windows 10 IoT

    Quote Originally Posted by NavyLCDR View Post
    That's probably it, in which case, wouldn't Secure Boot need to be turned off anyway to get Windows 7 to boot after it was installed? I don't think Windows 7 supports Secure Boot in any way shape or form, before or after installed.
    Yes, secure boot has to be turned off to install Windows 7. Windows 7 doesn't have the secure boot code required by the PC's firmware (BIOS) if its enabled. It's flagged as untrusted. Turn secure boot off and those checks are not dome. and the install will continue. You have to do the same thing to install Linux etc. Only Windows 8.0, 8.1, and Windows 10 support secure boot.
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  5.    10 Mar 2017 #5
    Join Date : Jun 2014
    Posts : 540
    Microsoft Windows 10 Pro 64-bit
    Thread Starter

    Quote Originally Posted by alphanumeric View Post
    Yes, secure boot has to be turned off to install Windows 7. Windows 7 doesn't have the secure boot code required by the PC's firmware (BIOS) if its enabled. It's flagged as untrusted. Turn secure boot off and those checks are not dome. and the install will continue. You have to do the same thing to install Linux etc. Only Windows 8.0, 8.1, and Windows 10 support secure boot.
    No it's not that I tried all that, I actually found a thread on the Acer forums years ago that said the only way to install win7 was to downgrade the BIOS .

    The only installers that will work are Win 8 and above anything below 8 is blacklisted.

    Microsoft created some pretty good deals for manufactures when Win 8 was first released and I think after a while of complaints from users and business they changed their minds.
      My ComputerSystem Spec
  6.    11 Mar 2017 #6
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,408
    Windows 10 IoT

    First I've heard of something like this. I'm not an expert in that area, but I don't think you can install Windows 7 from Windows 10's pre installation environment. If you can I don't know how its done.
      My ComputerSystem Spec
  7.    11 Mar 2017 #7
    Join Date : Jul 2015
    California
    Posts : 203
    Kernel 4.x.x

    You can install Windows 7 from Windows 10 PE manually.

    Set up partition to contain Windows 7.
    Boot Windows 10 PE.
    Insert Windows 7 install media.
    Once you get control of the keyboard, press Shift + F10 to get a command prompt.
    Take note of your Windows 7 install media drive letter, and the drive letter of your volume that it will be installed to.
    (All following drive letters and indexes are only examples.)

    D: (install media)
    E: (win 7 os partition)

    Use dism to determine which wim index is the one you want installed.
    A windows 7 ultimate iso for example has 4 indexes.

    1: Windows 7 Basic
    2: Windows 7 Home
    3: Windows 7 Professional
    4: Windows 7 Ultimate

    Code:
    dism /get-imageinfo /imagefile:D:\sources\install.wim
    Let's say we want to install Ultimate Edition.

    The command would be:

    Code:
    dism /apply-image /index:4 /imagefile:D:\sources\install.wim /applydir:E:\
    After some time the command will finish and return.

    Now you need to edit the bcd to add a boot entry for the new os.

    Mount your boot partition

    Code:
    mountvol B: /s
    Add boot entry to bcd

    Code:
    bcdedit /store B:\efi\Microsoft\boot\bcd /create /d "Windows 7" /application osloader>output.txt
    for /F "tokens=2 delims={}" %g in (output.txt) do (set _newguid=%g)
    bcdedit /store B:\efi\Microsoft\boot\bcd /set {%_newguid%} device partition=E:
    bcdedit /store B:\efi\Microsoft\boot\bcd /set {%_newguid%} osdevice partition=E:
    bcdedit /store B:\efi\Microsoft\boot\bcd /set {%_newguid%} path \Windows\system32\winload.efi
    bcdedit /store B:\efi\Microsoft\boot\bcd /set {%_newguid%} systemroot \Windows
    That's the super fun way in manually installing windows when no external tools are available.

    Otherwise use something like WinNT Setup which runs fine in a PE environment.
    Last edited by Hydranix; 11 Mar 2017 at 10:36.
      My ComputersSystem Spec
  8.    11 Mar 2017 #8
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,408
    Windows 10 IoT

    Works every time, lol. As soon as you say something can't be done somebody will post how to do it.
      My ComputerSystem Spec

 


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