This may not be useful but since I stumbled into this fix yesterday here goes:
1710 (4yr old lappie) with an older synaptics pad
Win 7 - installed synaptics driver addon over the windows one.
Was experiencing choppy or no scroll ability.
Fixed by lowering vertical scroll speed to somewhere between lowest setting and one tick up from lowest. You might try playing with this setting and seeing if it helps scroll response.
I realize it may not be perfect, but I was...