Re: 2 questions ,
What is your system specs? I didn't think it needed a top notch pc, but its worth making sure its not that, and if so, try having a different skin, or making it smaller.
Another thing which I've noticed more and more and is why i mention it is, do you have the drivers on teh video card set up right? If you see lags when scrolling up and down text or moving around windows, this is your answer. Sorry I keep mentioning that but you never know...then again, games wouldn't run i'd guess
Try Winamp as this is a good and stable player, and is built for slow systems as well as fast just incase
Abit IP35 Pro / Q6600 G0 / Zalman 9700 / 8800GTS 640mb / 4x 2GB Corsair XMS / X-FI Xtreme M / 1x 1TB / Antec 900 / Logitech Z-5500 / Samsung 20inch