As far as I know, the key is integrated in the BIOS. See also the following article at Medion: https://www.medion.com/ch/de/service/_lightbox/showfaq.php?FAQ_ENTRY_OTHER_ID=21318&cid=0 Then there is the following article if the activation does not work: https://www.medion.com/ch/de/service/_lightbox/showfaq.php?FAQ_ENTRY_OTHER_ID=25401&cid=0 If you need the licence key for a new installation (or otherwise just like to write it down), you have to read it out of the active operating system: https://www.pcwelt.de/ratgeber/Windows-10-Key-auslesen-So-geht-s-und-warum-Sie-ihn-eigentlich-nicht-brauchen-9999889.html