What is the Keyboard Filter Driver in Windows?

The Keyboard Filter Driver is a low-level driver in Windows that helps manage the input from a keyboard. It typically works in conjunction with accessibility features or custom software that manipulates or intercepts keyboard input for specific purposes. For example, it can be used to:

• Implement features like key remapping or macro assignments.
• Provide security measures, such as filtering or blocking specific keys.
• Support accessibility tools for users with disabilities (e.g., sticky keys or other assistive technologies).
• Allow custom keyboard layouts or behaviors for specific applications.

In most cases, the Keyboard Filter Driver is automatically installed by Windows or by specific third-party software (such as keyboard drivers from manufacturers, key remapping tools, or accessibility software). It's not typically something that end-users need to manually install unless there's a specific need or third-party program involved.