A driver is a low-level software component that allows Windows 11 to communicate with a webcam’s hardware. Without a proper driver, the operating system cannot capture video streams, adjust exposure, or use the microphone (if integrated).
Or use Windows Update via PowerShell:
# List all camera devices pnputil /enum-devices /class Camera pnputil /add-driver C:\Drivers\webcam.inf /install web camera driver for windows 11