Whenever I attempt to view

Question

Whenever I attempt to view a youtube video, at certain intervals both the audio and video will speed up and become distorted. It also happens on music players on myspace and other networking sites. I have tried updating drivers on my sound card and on board sound, but neither helped. It has persisted for about 5 days now and started for no reason. All other music and video files work just fine as long as it is not an internet video or song. Any suggestions?