The Intel(R) 82801DBDBM SMBus Controller - 24C3 is a hardware component driver for the System Management Bus (SMBus)82801DB chipset (also known as ICH4). SMBus is a communication protocol used for managing low-speed system management devices like temperature sensors, power supplies, battery chargers, etc., in a computer.

This specific driver enables the operating system (in this case, Windows) to interface with the SMBus controller, which in turn allows it to manage the devices connected to the system's SMBus.