found this from previous post on this subject.
problem caused by latest MS update. by the time MS fixes
this we will be used to the bug and not concerned.
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position cursor "close" to the top/bottom of the
slider and it will scroll one window. farther away
from slider and it will scroll farther.
press on actual slider and it slides as you move mouse
(desktop computer...laptop will be using the button
or touchpad)
might try using the............
up/down arrow keys (adjust in keyboard properties
window).
pageup/pagedown keys do what is obvious.
home/end keys are too good to be true.
right click scrollbar
menu pops up
select an option
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