Dell XPS 13 (L321X, Early 2012) Touchpad suddenly stops working with new driver

Hello folks.

I have had this laptop for a while.  I found some forum posts about a problem from when I first bought this laptop, and I had resolved that problem by uninstalling the Dell provided Cypress drivers.

Recently, I found that there were newer drivers available from Dell.  Specifically, the newer drivers were released on April 10, 2014.  I installed them.

The drivers enable a number of nice features on this touchpad, including pinch to zoom, rotate and multitouch, but then the touchpad also suddenly stops working.  

Once I restart my laptop, it works once again, but then it'll stop working as suddenly as the first time.

I haven't figured out why it does this.  There's no indication of a failure or any indication of it turning itself off.

The driver I installed is Dell Touchpad Driver - Version 2.5.3.65, A07.  Below is the tray indicator, but it seems fine, even though the touchpad is presently not working.

Below is the Dell application and I've already tried turning it off and on, with no effect.

Below is a screenshot of my device manager, and it shows three devices.  One of them is my bluetooth mouse that I was not using earlier, but once the touchpad became unresponsive, I had to.

Below is the cypress driver info.

Does anyone have any clues on how to re-enable the touchpad once it stops working?  None of the methods I've tried so far works, and I have to restart my laptop to get the touchpad back.

Thanks.