Hallo @kallegauner
Mit einem Utilities Ultimate- Produktschlüssel kann man keine Norton 360-Lizenz verlängern. Sollte der entsprechende PC ein gültiges Betriebssystem( ab Windows 7 SP1 und höher) aufweisen, dann führe mal das NRnR- Tool aus( LINK). Anschließend dann einloggen mit der entsprechenden Norton 360-Lizenz.
LINK zu den ,, Systemanforderungen zum Installieren und Einrichten des Norton-Schutzes"
Find your Norton product key
https://support.norton.com/sp/en/us/home/current/solutions/v54413149
Learn how to use your Norton product key
https://support.norton.com/sp/en/us/home/current/solutions/v71537110
Download and install your Norton device security
https://support.norton.com/sp/en/us/norton-download-install/current/solutions/kb20090708112600EN
Activate or renew your Norton subscription
https://support.norton.com/sp/en/us/home/current/solutions/v24808774
https://my.norton.com/extspa/onboard/setup#/registration/home/reg/setupselection
Product key invalid
Find your Norton product key
There are different ways to find your product key depending upon your situation. In most cases, you do not need the product key to update your Norton subscription. If your Norton device security product is expired or shows incorrect subscription days, then you may need to download the product from your account which has the current subscription.
If you see a message "Invalid Product Key" while activating, read Message "Invalid Product Key".
If you are from China, Japan, or Korea, your product key can be found in the second email that is sent with the purchase information.
https://support.norton.com/sp/en/us/home/current/solutions/v54413149
