i have an inspiron 1420 that i switched from vista to xp pro but my audio and video are choppy and distorted and crackling. the only thing i can seem to find out of line is a exclamation point in a yellow circle in my device manager next to modem device on high definition audio bus. can anyone help me? i have tried fixing this myself for literally the past 2 weeks with at the very least 4 hours a day. I did give a valiant effort and i am soooo hoping someone on here can rid me of this headache! Thank you in advance for any help your willing to provide!