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

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

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

@rezpower, pleasee see thistutorial: Clean Install Windows 10 without DVD or USB Flash Drive

Kari

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.