Format 2nd PC

I would download the GPARTED .iso file and create the bootable LiveCD, boot to it on the Linux computer and delete all partitions. Leave it blank then boot the Win10 disc or USB Thumb drive created using the MCT/Media Creation Tool on the Windows machine to download either the .iso file to create a bootable DVD or an 8GB USB Thumb drive for booting and install, let Windows do its thing. Your Linux machine should have a USB Image Writer, put the downloaded Windows .iso file on it to use as the Source to create the USB Thumb drive. I did that just yesterday to get a Hiren's Boot CD program created on a USB drive, Linux didn't care that it was Windows XP based. I also did it with the GPARTED LiveCD .iso file to create a bootable USB Thumb drive, the process is written on the GPARTED site and free.
GParted -- A free application for graphically managing disk
device partitions
There are procedures for Windows but sometimes doesn't get all the little partitions cleaned up.

Berton said:

I would download the GPARTED .iso file and create the bootable LiveCD, boot to it on the Linux computer and delete all partitions.

Would that be strictly necessary? Cannot you just delete each of the existing partitions from within the Windows setup once you have booted from USB made by the MCT? And if not, couldn't you boot the install USB to a command prompt then use Diskpart's CLEAN command to remove all partition information?

Clean Install Windows 10

Open Command Prompt at Boot in Windows 10

@donsd

Minitool Partition Wizard (free), can see, create, delete... Ext4 partitions.

Best Free Partition Manager for Windows | MiniTool Partition Wizard Free


To test, I just created a 747 GB Ext4 partition and formatted it. Then just right clicked and chose: Delete.
Worked, no problem.

1. Boot a Windows install USB (10 or 11
2. At the first window, press Shift+F10
3. In the Command Prompt window enter:

diskpart
list disk
sel disk # (where # is the number of the disk with the EXT4 partition on it)
clean
exit
exit

4. Your done, remove USB flash drive.