The ViGEm Bus Driver is a Windows kernel-mode driver that allows your PC to view any controller connected as an Xbox 360 controller. It is a part of the Virtual Gamepad Emulation Framework (ViGEm) and aims for a 100% accurate emulation of well-known gaming peripherals as pure software-based devices at kernel level. The ViGEm Bus Driver is compatible with a wide range of input devices, including Xbox controllers, DualShock controllers, and generic HID controllers. It supports popular gaming platforms like Steam and supports multiple devices connected to the same driver instance. The ViGEm Bus Driver is primarily used by gamers and is a flexible and powerful tool for anyone looking to customize their input device mappings for gaming or other applications.