Here are some solutions to resolve the 0xA00F429F error in the camera app on Windows 10 and 11:
Check your privacy settings: Go to Windows Settings > Privacy > Camera and make sure that the camera app has access to the camera.
Update your drivers: Outdated drivers can cause issues with the camera. Go to the manufacturer's website to download the latest drivers for your camera.
Reinstall the camera app: Go to Windows Settings > Apps > Apps & features and select the camera app. Click on “Uninstall” and then restart your device. The camera app will be reinstalled automatically after restarting.
Use the Windows Troubleshooter: Go to Windows Settings > Update & Security > Troubleshoot and select the Camera app troubleshooter. Follow the on-screen instructions to resolve the error.
Reset the camera app: Go to Windows Settings > Apps > Apps & features and select the camera app. Click on “Advanced options” and then “Reset.”
Perform a system restore: If none of the above steps work, try performing a system restore to a previous date before the issue began.
Contact Microsoft support: If the issue still persists, contact Microsoft support for further assistance.
It is recommended to try these steps one by one until the issue is resolved.