A failed video call does not automatically mean the camera is broken.
The camera may be physically disabled, missing from Windows, affected by a device or driver problem, or blocked by privacy settings.
The useful first question is:
Can Windows itself detect and use the camera?
Check physical camera controls first
Some laptops and webcams have hardware controls that disable or cover the camera.
Microsoft documents camera keys, laptop switches, and built-in privacy shutters as possible controls. [R1]
Check that the lens is uncovered and that any camera switch or keyboard camera key is enabled before changing Windows settings.
For an external USB camera, also confirm that its cable is secure. If possible, test another USB port.
Check whether Windows detects the camera
Open the Windows Camera app.
Microsoft recommends using the Camera app to determine whether the problem affects Windows generally or only one application. If the camera works there but fails somewhere else, the problem is likely specific to that application or its settings. [R1]
If Windows reports 0xA00F4244, Microsoft identifies that code as camera not detected. [R1]
Open Device Manager and look under Cameras, Imaging devices, or Sound, video and game controllers. If the camera is not listed, Microsoft recommends scanning for hardware changes. [R1]
A camera that is completely absent from Device Manager is a different problem from a camera that is listed but cannot be used by one application.
Check whether the camera is disabled or reporting a device problem
If the camera appears in Device Manager, confirm that it is enabled.
A disabled camera can be enabled from Device Manager. [R1]
If Windows reports a Plug and Play or device error, record that error before reinstalling anything. The error state is useful evidence because it shows that Windows can see the hardware but cannot start or use it normally.
If the problem began immediately after a driver or Windows update, Microsoft documents Roll Back Driver as a targeted recovery step when that option is available. [R1]
Do not roll back a working camera merely because its driver is recent.
Check camera privacy access
A camera can be detected correctly but still be unavailable to applications.
Open Settings > Privacy & security > Camera.
Microsoft says Camera access must be enabled. Microsoft Store applications also require Let apps access your camera, while desktop applications such as browsers and many video-conferencing programs depend on Let desktop apps access your camera. [R2]
If Camera access is disabled and the setting is greyed out, Microsoft says an administrator must change it. [R2]
On a work or school PC, do not bypass an organizational restriction. Contact the administrator responsible for the device.
What if only one application fails?
Test the camera with the Windows Camera app.
If the preview works there, Microsoft says a failure in another application points to that application's settings rather than a general camera failure. [R1]
Check that application's selected camera and its Windows camera permission before changing the system driver.
The separate condition where Windows reports that another application is already using the camera should be diagnosed as a camera-in-use problem, not as a missing-camera problem.
When should you change the driver?
Driver repair becomes relevant when Windows does not detect the camera, Device Manager reports a device problem, or the camera stopped working immediately after a driver or Windows update.
Microsoft recommends checking Windows Update, including optional driver updates, and documents scanning for hardware changes, rolling back a recent driver, or reinstalling the camera device when appropriate. [R1]
These actions should follow evidence that the device or driver path is failing.
What should I do now?
- Check the lens cover, privacy shutter, hardware camera switch, and keyboard camera key.
- For an external camera, confirm its connection and try another USB port if available.
- Open the Windows Camera app and see whether it produces a picture.
- Check Device Manager to confirm that Windows detects and enables the camera.
- Record any device or camera error code before making changes.
- Open Settings > Privacy & security > Camera and verify the required access settings.
- If the Camera app works but one application fails, troubleshoot that application's camera selection and permission.
- If the camera disappeared or failed immediately after an update, investigate the driver and consider a documented rollback where appropriate.
- If Windows still cannot detect a known-good external camera on another port, or an integrated camera remains absent after appropriate driver checks, hardware failure becomes more plausible.
The goal is to determine whether the failure is at the physical control, device detection, driver/device state, privacy permission, or application layer and repair only the layer that is actually failing.