The Intel(R) Serial IO I2C Host Controller - 31B8 is a driver for a hardware component on Intel-based systems that provides support for the I2C (Inter-Integrated Circuit) communication protocol. I2C is commonly used for communication between low-speed peripheral devices and the central processor, such as sensors, chips, and other integrated circuits. It’s frequently found in embedded systems and devices like touchpads, sensors, power management controllers, and other system management functions.

The Intel Serial IO I2C Host Controller driver allows Windows to communicate with the I2C hardware on your motherboard or laptop, enabling devices that rely on I2C for data transfer to function correctly.