How to remove sound from video?

How can i remove the original sound of a video clip and put new sound instead of ?

Regards

You have to import the video into an editing program, delete the audio track, and add any sounds you want. iMovie or Windows Movie Maker are two simple options.

i have did that with movie maker but when i am deleting sound the video will delete also. maybe i need to know more.
thanks

To delete a sound in Movie Maker, put the video into the project. Select the video clip and go to the Clip menu -> Audio -> Volume - Here you can mute the video.