Music and adverts playing in the background of my laptop?

Try booting into safe mode and see if it still plays, and if it does, chances are that it's coming from another source since safe mode disables sound. If it does persist only in normal, check your msconfig for weird programs or your autoexec.bat *Dangerous, do not modify until you're certain* Also, try a bootable CD like Dr. Web CureIt and Kaspersky's