Do you have the Dell synaptics touchpad driver installed?
Rik from RCE
Nearly a Posting Maven
2,335 posts since May 2009
Reputation Points: 127
Solved Threads: 199
Try disabling "Tap to click" in the touchpad settings
goldeagle2005
Finkus Stinkalotus
1,500 posts since Jun 2005
Reputation Points: 67
Solved Threads: 45