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So I know very little about computers, but the scoll issue on my HP Pavilion dv7 was driving me insane as well, and after messing with it enough I *think* this might help you (since it solved my problem).
When you go into "Touchpad Properties" you see the series of checkboxes. You'd THINK that when "scrolling" is checked, it would mean scrolling is enabled, but I found that was not the case. When you click on "Scrolling" you will see a couple icons show up nearby on the right side, one that looks like a gear ("Settings"), and a question mark. Click on the "Settings" gear icon and it will open another window. In this window there are five different check boxes under the section "One-Finger Scrolling". I clicked both the "Enable vertical scrolling" and "Enable horizontal scrolling".
That being said, I really thing Symantec could improve the user interface to make the settings more intuitive... it's ridiculous that checking "scrolling" doesn't actually enable scrolling unless you click on the hidden sub-menu gear icon.
Maybe this is something you have already tried, like I said, I know little about computers 
But it worked for me!
I finally fixed mine! I went to the Control Panel and searched "Mouse." Then I went to the "Device Settings" tab. Toward the buttom of that page and just above the "OK" button there is a "Reset Devices" button. After clicking that my Synaptics TouchPad finally started working again. Hope this helps someone
