The program on Windows 11 is called Lenovo Vantage. Launch it and then check for updates. BIOS updates will only be performed if the power cable is connected.
I haven’t tried using Windows Update before. Indeed, after installing the updates, a system firmware “driver” with version 1.66 appears in the manager, but after rebooting, the update does not happen. Rather, a blue screen appears, on which the update bar fills up very quickly and the laptop reboots. After rebooting, the version remains the same.
@rauchweihe Unfortunately, Lenovo Vantage does not offer any updates. The information about the power cable is useful, but it didn’t help either
PS: BIOS options for updating and rolling back updates have been enabled all this time
Have you tried this: https://support.lenovo.com/in/de/downloads/ds556845
Maybe you need to do it in baby steps rather than jumping directly to the newest.