Edit: Managed to solve my problem. Seems to be working fine now.

When I did it It was a very fast process, it did say it was successful for like half a second and then the cmd window dissapeared. I don't think you should worry much about that, just reboot your computer If you are sure no processes are stilll working (If you waited for an hour after updating I'm 100% sure it did finish) And check your bios version afterwards in gpu-z

Thanks for the reply. I think it's definitely working. Before the update my GPU would sit at around 75c while playing games at unlocked frame rates. that's now gone down to about 65c - 68c so something has definitely changed

Check your bios version via nvidia control panel or nvidia inspector