The new zonelarm extreme has a part called forcefield that will cause dvdrebuilder to not startup. You can even go to the program files and click on dvdrebuilder.exe that starts the program but you get nothing. You have to go to windows services and stop the ISWsvc service for forcefield to be able to start dvdrebuilder. stopping zonealarm or stopping the forcefield part of zonealarm does not help. Zonealarm is aware of the problem and is working on it. Just thought I would pass this along.