Installed Windows 8 and all drivers; unknown device

I always have an unknown device in Device Manager:

ACPI\VEN_LEN & DEV_0078

I have the latest version of the bios 2.02.

Does anyone knows how to fix this?

Thanks for your suggestion. I initially thought the same thing and reinstalled the driver for power management, but the unknown device is still there. It's actually the Intel Management Engine Interface 8.1 and Serial Over LAN (SOL) Driver for Windows 8 (32-bit, 64-bit) - ThinkPad I forgot to install.

Tags: ThinkPad Notebooks

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