This problem might actually be a combination of the tap-to-click feature of the touchpad (They do it with the little trackpoints, too.) and the dumb Windows Explorer feature that causes apps to launch with a single click. That option can be changed from single click to double click on the General tab of the Folder Options dialog.
And, yes, enabling tap-to-click by default on touchpads and trackpoints is really, really, really stupid. I've seen some touchpad systems that were so sensitive that they made the initial OS installation very hard to get through (without making lots of choices you really didn't want to make). After an OS installation on any notebook the first thing I do is to install the blasted touchpad / trackpoint drivers and turn off tap-to-click. I've even written letters to Alps and Synaptic about this. No response. Jerks.