If the Camera is reporting that it is blocked or turned off in Windows 11/10, follow the solutions mentioned in this post to fix the issue..

If your camera is not working in Zoom, you can still participate in meetings with just your microphone. However, it's always better to chat face-to-face, so it's worth the effort to fix your Zoom ...

The 0xa00f4288, All Cameras Are Reserved error occurs when users try to open the camera app. Here are fixes that have helped many!