The Realtek IR Driver (5161) is a Windows driver designed for infrared (IR) devices, typically used for wireless communication between a computer and external peripherals, such as remote controls, infrared-enabled keyboards, mice, or other IR-based devices. The driver is for a specific Realtek IR receiver or transceiver chip (Model 5161), which is integrated into some computers, laptops, or motherboards.

This driver allows the operating system to recognize and communicate with the IR hardware, enabling data transfer or control commands via infrared signals.