I've limited the variables of this problem down to a few. Last night I left my pc on because I was downloading a large file. This morning my room mates again forgot to pay the power bill, our power was shut off. I turn my computer back on, and now when I play songs and video files, anything with sound, I hear this fuzzyness, feedback, popping like sound in the background of the speakers, sometimes, depending on the song, it gets so extreme I don't even want to listen to the song. I have Altec Lansing Series 100 speakers. I tried another set of speakers, and another ac120 volt adapter, I'm guessing it could be my soundcard? Or something...I'm not even sure what type of soundcard I have. Please, any advice/suggestions would be helpful. Thank you.