Did I really clean install?

Does Windows boot, load, and come up with a nice desktop? While maybe not an absolute clean reinstall, it might be good enough. If the software "asked" you to reboot one time or two, it could have very well reinstalled quite nicely.

mibaup said:

Hi,

I just noticed I may have not perform a real clean installation:
I created a bootable USB stick using Rufus, which wasn't detected by my BIOS, so inside Windows I simply plugged the USB stick, double-clicked on the drive under "This PC" and clicked on setup.exe that appeared inside after creating the bootable USB stick.

It did install Windows, but is it a clean install?

That would be considered a repair install with an in-place upgrade.

You would have to boot from the USB stick and install Windows that way, keeping nothing.

mibaup said:

I found out why the USB wasn't recognized by the BIOS:
I used Rufus to create the bootable USB, and I chose "MBR partition scheme for BIOS or UEFI", which didn't work. so I now chose "GPT scheme for UEFI" , and it is recognized.
The installation looks different. and this time it is a more "clean" one, because without using it at boot, it leaves some remnants on the PC.

Good to hear. Please go ahead and mark the thread as solved. Cheers!