If you are having problem making your scroll bar scroll to position other than the top, this post is what you are looking for.Let me be more clear to see if the description fits your situation: you open a folder in your File Explorer, let say, to see the pictures.
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I haven't turned on the scroll wheel. I never touch it. I don't move my mouse at all when the page starts just randomly scrolling up and down. I'm not even touching it when this happens. It's almost as if there's someone else controlling my computer from another computer, like those connected to a common server in a workplace.