Touchpad drivers

What does a touchpad driver do?

A touchpad driver lets a flat capacitive surface act as a pointing device for a laptop. Beneath the pad is a grid of transparent conductive electrodes. When a finger approaches, it changes the capacitance at nearby grid intersections, and a touch controller measures those changes to locate each contact point. Unlike a mouse, the pad reports absolute positions, where each finger is on the surface, rather than relative motion, and it tracks several fingers at once for gestures.

On most laptops sold in the last several years the pad is a Windows Precision Touchpad. In this model the controller sends standardised absolute-coordinate HID reports, usually over an I2C bus using the HID over I2C protocol, and Windows itself interprets them. The inbox driver understands multi-contact reports, so two-finger scrolling, pinch zoom, three- and four-finger swipes and tap-to-click behave consistently and are configured under Settings, Bluetooth and devices, Touchpad.

Read the full touchpad driver explainer

Compatibility is model-specific

A driver is associated with hardware identifiers, an operating-system driver model, and a processor architecture. Devices in the same category can expose different controllers, firmware interfaces, and optional feature layers, so a category name alone does not establish package compatibility.

Where this driver fits in Windows

The touchpad driver sits between Windows, the applications you use, and the physical hardware. This layered view shows where the driver translates operating-system requests into device actions.