I was using WinAmp before, and I uninstalled WinAmp because I wanted to use the software bundled with my laptop that would allow me to play music using the hardware buttons on the front of the case (Acer 1714SMi). After uninstalling WinAmp, I tried playing my music in Windows XP SP2, with WMP ver 9.00.00.3250 and there is no sound in the videos I have, and the .mp3 files result in errors that won't even open in the player. Any suggestions? I'm going to re-format in about two hours anyways, but apart from a reformat, could there be any other help?