I have a Toshiba Satellite A305-S6916 laptop running Windows Vista. On the front of the laptop underneath the touchpad is a little volume slider wheel that's directly attatched to the motherboard. For the past few months when I use it it'll spam b's and c's into whatever typing window I may have open, I'll spin it right now for an example: bbbcccccbbbbbbccbbcccc
Any ideas? The actual volume still moves up and down when I use the slider, and it's always felt loose since I first bought it, haven't been particularly fond of the thing. Sometimes it takes some work to get it to stay on one volume level (it'll move the level up and back down sometimes when I roll it in one direction) and sometimes I notice it randomly turns the volume up to max even when I'm not messing with it. As far as I know I can't disable it, otherwise I'd just turn it off and manually adjust the volume slider. It's certainly something I can live with, but it worries me, I don't want it to turn into a bigger problem later on.
Any insight would be greatly appreciated, thanks a lot for your time.