• Do not close this window.
• to open a new browser window.
• Compare the two numbers. If the above number is different between the two windows you are OK.
  If not, you have some serious privacy issues! Read more here.
  

Notice! The default in Windows Media Player 9 is not to send a unique Player ID and not to return it through script calls. With Windows Media Player 9 you always get the Player ID {3300AD50-2C39-46c0-AE0A-000000000000}. If you see this Player ID instead of a random one you are safe.