Recently i brought a new laptop, when i first got it i never watched HD Videos but on my previous laptop (XP) HD videos worked perfectly, on youtube, and other programmes i watch HD on. but now ive tryed watching HD videos on youtube and on a programme i use and it goes unbelivable slow, the audio is fine. i watch it on my laptop and the video goes slow, and the audio is fine. it never did this for my old laptop. any ideas?