Description of problem: Unknown device - neznámé zařízení - ACPI\VEN_VPC & DEV_2004 ACPI VEN VPC DEV 2004
There is some unknown hardware after installation operating system. My device manager show me some unknown device.
Identification of unknown device is: ACPI\VEN_VPC&DEV_2004 ACPI VEN VPC DEV 2004
Solution of problem: Unknown device - neznámé zařízení - ACPI\VEN_VPC & DEV_2004 ACPI VEN VPC DEV 2004
Install correct driver for Lenovo Energy Management Driver for Windows 8.1 (64-bit) - Ideapad 305-15IHW, Lenovo B40-70, B50-70, E40-70, E50-70 Notebook.
Name of installation file is 32em00ww.exe
You can download drivers for you unknown device here: ACPI\VEN_VPC&DEV_2004