Windows 10 downgrade to Windows 8?

Ja
3

I wanted to downgrade my laptop back to Windows 8 because Win10 does not work that way. So far no problem, but I would like to know if the key is then taken over. Yes, I know that a Win8.1 key costs 8 euro, but you save where you can. So, does anyone know?

ca

A Windows 10 key is not valid for Windows 8.
A Windows 8 key but for Windows10.

Ja

Ah ok.

Gu

Download Ubuntu that is a Linux system but has a downgrade tool