camera error not working

Run the Windows 11 Camera troubleshooter first for error 0xA00F4271 <MediaCaptureFailedEvent> (0xC00D36D5), because Microsoft does not document a separate fix for this exact code and directs camera capture failures through its standard diagnostic sequence.^1^

1. Run the automated troubleshooter

1. Open Start → Settings → System → Troubleshoot → Other troubleshooters.
2. Find Camera, select Run, and complete the suggested actions.
3. Restart the PC, then open Start → Camera and test it.

Alternatively, open Get Help, search for camera troubleshooter, and run the automated diagnostic.

2. Check the camera switch and permissions

Check for a physical privacy shutter near the camera lens, a camera switch on the laptop’s side, or a keyboard key displaying a camera icon. Depending on the device, the keyboard control might require Fn + the camera key.

Then open Settings → Privacy & security → Camera and turn on:

• Camera access
• Let apps access your camera
• Access for the Camera app
• Let desktop apps access your camera if the problem also affects browsers, Teams, Zoom, or similar desktop programs

If Camera access is greyed out, an administrator must enable it.^2^

3. Check whether Windows detects the camera

1. Open Settings → Bluetooth & devices → Cameras.
2. If the camera appears under Disabled cameras, select it and choose Enable. Administrator access is required.
3. If it appears under Connected cameras, select it and test the preview or choose Troubleshoot.^3^

If the preview works there or in the Camera app but fails only in another application, close other programs that might be using the camera and check that application’s camera selection and permissions.

4. Repair the camera driver

If Windows detects the device but capture still fails:

1. Right-click Start → Device Manager.
2. Expand Cameras. Also check Imaging devices and Sound, video and game controllers.
3. Right-click the camera and select Properties → Driver.
4. If the failure began after an update, select Roll Back Driver, restart, and retest.
5. If rollback is unavailable or does not work:
   • Select Uninstall Device.
   • Select Attempt to remove the driver for this device if offered.
   • Select Uninstall.
   • In Device Manager, select Action → Scan for hardware changes.
   • Restart the PC and test the Camera app.

Also check Settings → Windows Update → Advanced options → Optional updates for a camera driver.^1^

Conditional checks

• Windows 11 version 24H2 or later: Open Settings → Bluetooth & devices → Cameras → your camera → Edit under Advanced camera options, enable Basic camera, and retest. This can bypass problems involving manufacturer plug-ins or hardware acceleration.^3^
• External USB webcam: Connect it directly to another USB port rather than through a hub. If possible, test it on another computer.
• Camera absent from both Settings and Device Manager: Select Device Manager → Action → Scan for hardware changes. If it remains absent, install the camera driver provided for the exact PC or webcam model by its manufacturer. Continued absence can indicate a hardware or firmware-level problem.

References

1. Camera doesn't work in Windows | Microsoft Support
2. Manage app permissions for a camera in Windows | Microsoft Support
3. Manage cameras with Camera settings in Windows 11