Clean installing windows 10 from within windows [Without CD or USB]

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  1. Posts : 324
    Windows 10 Pro 64bit
    Thread Starter
       #11

    @dalchina:
    Yes that's exactly what I need to do but you also have a valid point here. It would be great if I could download the1909 iso and not the 2004!
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  2. Posts : 4,071
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #12

    If you don't have win10 ver1909, you can download from MS using Heidoc tool.
    If you want to make a USB boot able installation drive (Fat 32 drive) you need work on it.
    As sources\install.wim is bigger than 4G you have to split it to smaller install.swm files
    Clean installing windows 10 from within windows [Without CD or USB] Attached Files
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  3. Posts : 56,100
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #13

    This includes the Heidoc method.

    Rufus will handle an ISO greater than 4GB for creating a bootable thumb drive. Rufus - The Official Website (Download, New Releases)

    Download Windows 10 ISO File
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  4. Posts : 2,597
    trying to install win10
       #14

    rezpower said:
    ...

    ...by copying the content of the iso on a drive (Not system drive C: , But on D: for example ) and run setup.exe from windows. Dose anyone know if this will still work and if it is OK to do it this way ?
    Yes. Unless it has been changed in the recent build, but I doubt it.

    When setup.exe is run, it should offer a choice of upgrade or install (custom).

    An alternative to using setup.exe is to use dism or another tool to apply the image from install.wim onto the target partition. Then add a boot menu entry with bcdboot.
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  5. Posts : 11,585
    Windows 10 Home x64 Version 21H2 Build 19044.1776
       #15

    SIW2 said:
    Yes. Unless it has been changed in the recent build, but I doubt it.

    When setup.exe is run, it should offer a choice of upgrade or install (custom).

    An alternative to using setup.exe is to use dism or another tool to apply the image from install.wim onto the target partition. Then add a boot menu entry with bcdboot.
    SIW2,

    You are agreeing that it is possible to run a clean install from within Windows?

    Denis
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  6. Posts : 17,640
    Windows 10 Pro
       #16
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  7. Posts : 4,071
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #17

    Megahertz said:
    You can do a clean install by booting WinRE (repair) and then go to the Win 10 installation files and run setup.
    - Create a small (8G) partition at the end of the disk and assign a letter to it.
    - Download Win 10 iso. Mount it and extract all files and folders to a folder in the partition created above.
    - Restart the computer and during POST hit F8 to enter Boot options and select repair and launch a CMD window.
    - Navigate to the folder with the Win 10 files you extracted from iso.
    - Run setup.
    - Delete all partitions except the with Win 10 installation files (last partition) and proceed.

    If you want to upgrade from win8.x to Win 10, run setup from running Windows.
    Made some modifications on the procedure as I realized that on a Clean Install you delete all partitions so the installation files must be on a partition that you won't delete during installation. You can delete it afterwords.

    Edit: Just seen Kari tutorial and my instructions are basically the same. Please follow his tutorial.
    Last edited by Megahertz; 15 Jul 2020 at 07:40.
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  8. Posts : 324
    Windows 10 Pro 64bit
    Thread Starter
       #18

    This forum is a gem and you guys are amazing! Thanks a lot for all your precious inputs and your help guys :)
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