Net Zero United Online Automatic Download of Destktop Icon Advertisement Without My Knowledge or Permission Internet

I turned on my computer this morning and found NetZero had downloaded and embedded an icon on my desktop, which advertised one month free service that included links to "get started".

The only thing I have done on my computer lately is order some DVD movies from Amazon - but I am not aware of authorizing or granting permission to any company to install/download advertisement icons on my computer during this process!

Is this the wave of the future? Companies just downloading advertisements on to your hard drive/desktop if you dare go online? Who gave NetZero permission to install their crap on my computer? Is NetZero working with another company to do this without browser/consumer knowledge? Is this unauthorized download a violation of my personal privacy? How did they get in and how do I stop them or anyone else from doing this again?

While I may not have been "ripped off" financially yet, I decided to file a complaint because of the Ripoff Reports discussions about "bad business" practices and who knows, maybe other people turned on their computer this morning to find the same icon on their computer too.

Also, after reading about some of the highly aggressive tactics used on other consumers by NetZero on the Ripoff Report, I am only left to wonder; now that they have embedded themselves on my computer and have my IP address in their database, will I also get to see automatic lifetime charges for services I never signed up for and/or spend countless hours trying to stop their intrusions and/or harassment?

Finally, because I have no idea who to turn to or who might be the responsible legal agency to file a complaint with or to find out if this is even legal, I wanted to have a record filed SOMEWHERE as to when NetZero planted themselves into my computer.