BTW_ you might want to use a third party application that plays real video and audio files instead of using Real Player;
something that is not always trying to monitor your activity and sell you products by always connecting to the web.
Also, use a good firewall to make sure whatever app you use is not always connecting to the web in stealth mode. Most people don't know that a lot of the software that's on their computer is constantly trying to secretly connect to the web, either when you open them, or even when you are not working with that application. A good firewall like Zone Alarm will monitor and prevent such activity. Then backup your security and privacy with software that cleans your cache, as well as other software like Ad Aware that searches and cleans out spybots and so forth.... What you do in Real audio is still recorded on your computer in places like your IE cache which backs up and buffers what you maybe watching or listening to on your computer.