IBM viavoice usbpro has major conflict issues with mcafee internet security suite(6.)Ibm redirects you to scansoft that has a lousy support which is charged to your credit card after the first free query;their online knowledge database is sparse and the tech personell seem to be reading their answers from algorhythms with background knowledge barely above the average customer's; Mcafee has a more extensive online database but no free tech support phone calls; problems of conflict between the softwares were related to TCP/IP port (viavoice apparently works through an open port) and to speech engine conflicts;none could resolve these issues;such issues in my opinion can only be resolved by interdisciplinary programmers;short of this the choice is one software verses the other