The SHARP Slow Infrared Adapter Windows driver refers to a device driver for an infrared (IR) adapter made by SHARP, typically used for communication between a computer and other devices via infrared (such as mobile phones, printers, or other IR-enabled devices). The "slow" part usually refers to the speed of the infrared data transfer rate, which was relatively slow compared to modern wireless communication methods like Bluetooth or Wi-Fi.

Infrared adapters allow devices to communicate wirelessly over short distances, and the driver ensures the adapter works properly with the Windows operating system. These adapters were commonly used in the late 1990s and early 2000s, especially before Bluetooth became widespread.