Got a different laptop, and I can't get it to do a smooth scroll up or down a page, either by using the arrow up/down buttons or by dragging the bar on the right side of the page with the mouse. Instead of a fluid, continuous movement, it gives me a jerky motion with some kind of rolling horizontal line thing as the page repositions. Looks kinda like an old TV that needs a "horizontal hold" adjustment.
What can I do about this? I can't find anything in the Control Panel Mouse settings that makes a difference.