I have having trouble getting synaptic touchpad back?

My enhancements kept closing because they would not respond, so I uninstalled the touchpad and tried installing a newer version of it. Whenever I try to install it i get an error saying these files cannot be opened because my internet security options are preventing files from being opened. Then I get something saying could not launch C:\USERS\PAUL\APPDATA\LOCAL\TEMP\SYNASET… WAIT NeeditCode!