If you are running Windows 11 on an older, unofficially supported ThinkPad (such as the T420, T430, or X230 series), Lenovo Vantage might not list the file. You will need to download and apply the driver manually: Driver Package Component Lenovo PM Device / Lenovo Power Manager Primary Hardware ID ACPI\VEN_LEN&DEV_0068 Supported OS Windows 10 & Windows 11 (64-bit) Official Source Lenovo Technical Support Portal
Yes, it is safe to install the driver. The device is a standard Lenovo PM Device used for power management. Installing the official driver will not harm your system and will restore lost functionality. acpi ven len&dev 0068 windows 11