Dell Inspiron 11z :: Windows 7 Ultimate X64 Touchpad Sensitivity Cannot Be Adjusted

Have a Dell 11z (1110) running w7 ultimate (x64) with all the updates, and cannot adjust the sensitivity. Problem is when typing, the slightest brush of the touchpad causes the cursor to jump.  And I mean the *slightest* touch! A mere brush of atoms on the touchpad causes the cursor jump. I have read and tried many of the suggestions form Dell and Windows communities, and nothing works.  There is no touchpad sensitivity - anywhere!

Here's what I've tried:

1. Hide pointer does not work.  Unchecked and checked the box several times.  No effect.  There is no adjustment from within the "mouse properties".  Trust me, it's not there.

2. Dell offers both the Elantech and Synaptics drivers.  I am an experienced Synaptics user.  I only want the Synaptics one because it supports standard scrolling on the trackpad, among other nice functions.  The Elantech "gesture" is junk (I am surprised that Dell offers it, but that's a topic for another
day). The Synaptics driver should offer a nice suite of tools, among which is a touchpad sensitivity tool:  it's not there.  The only capabilities that show up are "buttons".  I removed and reloaded Dell Synaptics drivers several times, rebooting after the uninstall every time.  Nothing but the simplest tool is available.

3. I downloaded the drivers (several in fact from various releases) from Synaptics and got no improvement.  The touchpad is not adjustable.

4. In desperation I installed the Alps driver, and although it functioned ok it did not have the any capabilities beyond Synaptics.

5. I downloaded several drivers from other vendors and got the same result: no touchpad sens adjustment capability.

6. Tried several 32 bit drivers:  some installed (probably because they had a hidden 64 bit install option).  No change!

So bottom line:  I cannot adjust the trackpad.  No matter what I do.