The Intel(R) Atom(TM) Processor I2C ES2 Controller is a part of the Intel Atom processor family, which is commonly used in low-power devices such as netbooks, tablets, and embedded systems. The I2C (Inter-Integrated Circuit) controller in this context handles communication with various low-speed peripherals over the I2C bus (e.g., sensors, temperature monitors, or other devices that require data transfer with low power consumption).

The Windows driver for the Intel Atom I2C ES2 Controller allows the operating system to properly interact with and utilize the I2C controller built into the processor. Without this driver, certain hardware components connected via the I2C bus might not function properly or be recognized by the system.