Why my videos from my camera play slow motion once i import?

I have videos from my nikon d5100 and i import them onto my computer, once i play the clip using windows media player the audio is fine but the video runs slow motion. To import, i use usb cable. I run on windows 7.

You need to play them on quicktime player
download from cnet.com

How old is your computer… Not too old since you're using 7. If the computer is too slow this will happen. I know because it happened to me.

Also I agree. Download Quick Time and use that as your player.