you sure those are the correct drivers? i dunno what kind of laptop you have of what it has inside it so i can't be much help.
this link might be the answer to your troubles but i am not 100% sure. if it doesn't work, then uninstall these drivers. http://drivers.softpedia.com/get/SOUND-CAR...river-391.shtml
also, i seriously doubt that Winamp could cause something like this. all it does is play music. but if it really did it, then this is proof that Winamp sucks.
and finally, go to Start > Run and type in "services.msc" without the quotes and go down the list to where it says "Windows Audio". make sure that the service is enabled. if it isn't Enable it.
edit: why did you post when i was posting