what the title says
EDIT: I just realised this is a bigger problem than I thought.
What is happening is this; I start to play back a song (through WMP or VLC or any other media player) and as the song is being played back, you start to hear some "glitching" noises randomly throughout the song. Basically it screws up the audio of the song, and this is extremely annoying when your trying to listen to a song.
Does anyone know why this happens/how to stop it happening?
(It used to happen on my old comp, but that was because almost all my ram was being used up, or so I was led to believe since when I exited memory hogging programs the audio went fine. However I'm on a relatively new install of windows 7 and my ram is not even at half capacity)