Digital camera audio problems, Any suggestions (10 points)?

Hey I recently bought a Fujifilm camera (the camera brand it self doesnt matter because I've got the same problem with every camera) For some reason when I Record something with the camera, it'll play perfectly on the camera and the audio will be fine but when i upload it to a computer or a labtop it'll become all scratchy and you wont be able to hear me because it cuts out and scrambles my words and you cannot make out what i'm saying.