Hey, my friend is having issues with her laptop. She can't use skype and listen to music or watch videos online at the same time. When she's on skype and opens itunes, it simply doesn't let her click play. If she's watching a video online and tries to use a webcam, she gets an error saying there was some problem with a playback device. She has a dell latitude e5500. She said the driver cd's said that they were already installed. Any ideas?