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When I edit I do not want natural sound in my videos. How do I remove it?

I think (don't have VS on this computer) on the edit panel you will see the box that shows the volume level. Next to it is a speaker icon. Clicking on that will mute the audio in your video clip.

I have tried that but it always seems to come back on. Is there a way to mute the clip and then copy it without the sound and then paste it into my project?

Alternatively render the video to a new file without sound

First, can you clarify whether you are talking about just one clip, or a project made up of several clips? If the latter, then the Mute button only applies to a single clip which is selected/highlighted in the timeline. You have to manually Mute all the others in the project if that is what you want.

If the Mute button continues not to work, then I would select a clip then instead of using the Mute button, I would manually change the volume level from its default setting (100) down to zero; then do that to all the other clips. You do that either by highlighting 100 and substituting it with 0; or by clicking on the downward pointing arrow to the left of the Mute button and dragging the slider down to the bottom.

Another thing you could try would be to highlight the video, then select Split Audio (second icon below the Mute button). The audio will then appear in one of the audio tracks. You then select it and simply delete it. You need to be aware, though, that in fact this is just smoke and mirrors since in reality all that happens is that what you are deleting is a copy of the original audio. The original audio really remains in the video stream, only muted. So if for some strange reason your Mute button is not functioning, that may not work either.

Failing that, then yes, you can try muting it, then going to Share > Create Video File > Save as First Clip or Same as Project Properties or whatever the format of the video is.

Which raises another point: you don't say what format your video is. If it is DV/AVI, then you can do this a few times and not affect the quality of the new video you are creating. But if it is mpeg video, then you can only do this a couple of times. After that, the lossy nature of the format will mean that you will start noticing loss in quality.

Or, if it is made up of lots of small clips, I would;
Make a new dv.avi file including the audio
Mute audio using one of the above methods
Make new file without audio.

This way you only have to mute one clip.