Weather Defender is a nifty program for weather enthusiasts. However, most of the data is available free from the National Weather Service. Also, it's extremely expensive and renders slow. You can download a free 7 day trial of the program, but don't expect all the features to work until you upgrade to the full program. And once you upgrade, you will be charged a $249.95 "activation fee" plus $29.95 per month. There are a lot of weather applications out there for FAR much less money. My two cents on Weather Defender? Not even close to worth the exorbitant prices they charge.