i just got my dell inspiron e1505 about 4 months a ago and already my audio driver has been messing up, i think it is a sigma tel because thats wat is listed under the device manager. Every time i log into my user name on xp the audio will work for about 3 minutes, then whenever i try to open itunes or a video no sound will come through at, but when i log off the system sounds are present. i have recently installed a program called reason which has to do with midi and audio drivers but i dont know if that would change anything. please respond if you have knowlage that would help me