Hi @Khalidmoha ,
In the preparation guide, there's a link to contact live support (end of page 1):
Feel free to check with them.
Also, another learner, @PiotrS made this page about webcam supported:
You can check there also, see if your webcam has been used by other candidates.
PS: if you want unofficial help from other learners in your topic, it would be great to provide additional information such as the iso checksum (to find which iso you are using), the type of laptop, the webcam model, your network connection type (RJ45, wifi...)... anything so that others can help you.