Error 0xA00F4243 commonly indicates the camera is reserved by another app. For a plug-and-play webcam on Windows 11, use this troubleshooting path:
- Run the automated camera troubleshooter in the Get Help app. It can diagnose and fix many camera issues automatically.
- Check camera privacy settings:
- Go to Start > Settings > Privacy & security > Camera.
- Make sure Camera access and Let apps access your camera are On.
- Check whether Windows installed a problematic driver:
- Right-click Start > Device Manager.
- Expand Cameras.
- Right-click the webcam > Properties > Driver.
- Try updating the driver through Windows Update first. Driver issues are a common cause of camera detection and camera app errors.
- If updating does not help, switch to the generic Windows camera driver:
- In Device Manager, right-click the camera > Properties > Driver > Update driver.
- Select Browse my computer for drivers.
- Select Let me pick from a list of available drivers on my computer.
- Select USB Video Device and complete the installation.
- If the webcam still does not work, unplug it and reconnect it, then test again in the Camera app.
- If the device appears with a driver problem in Device Manager, uninstalling and reinstalling the device driver can help. This is commonly used for camera driver issues.
If the webcam is built into a Surface device, an additional step is available:
- In Device Manager, expand Cameras, open the camera device, go to Driver, and select Uninstall Device, then restart the Surface.
- Warning: Do not do this on Surface Pro X. On that device, uninstalling drivers can require a full system reset to restore them.
- Camera app shows error "0xA00F4244 NoCamerasAreAttached" | Microsoft Support
- Camera app shows error "0xA00F4244 NoCamerasAreAttached" | Microsoft Support
- Surface camera not working | Microsoft Support
- Surface camera not working | Microsoft Support
- How to fix error code 0xA00F4243<CameraReservedByAnotherApp>(0xC00D3704) - Microsoft Q&A