The most effecient method to removing trial software bundled on new computer systems is utilizing a utility called The PC Decrapifier. The utility identifies all trialware on the system and allows the user to select which items to remove.
The author maintains a list of items that it identifies as trialware at: http://www.pcdecrapifier.com/apps
This tool can be downloaded from: http://www.pcdecrapifier.com/download