The computer randomly scrolls in all applications.  Scrolling DOWN in a browser, it scrolls back up.  In WORD, in any of the system settings screens, mail applications, etc.  It just randomly scrolls way down or up, or heads the other way from what I was scrolling.  I only have the touchpad.  I have tried all the mouse settings maneuvers.  This is the second c930 I bought because I thought the first one was defective.  So, do ALL of them have this issue??  I can’t find anything on the internet about this specific problem.  Thank you for any help.

[catlist name=technology]
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