Well, for the past few days, whenever I've tried to watch a video on YouTube, it plays but the picture moves so slowly and even slower than the audio. Whenever I pause the video, the picture doesn't stop, it carries on for a little. I've tried changing the quality from 360 to 240 and although the problem is fixed I when I change to 240, the quality becomes absolutely horrendous. I've use Mozilla Firefox and I've got Windows XP. I've also downloaded the latest Flash. I'm getting really frustrated. What can I do?