If you want to remove ads from MSN Messenger, but you don’t want to go to the extremes documented here, there is another option.
Open the file c:windowssystem32driversetchosts in notepad and add the following line:
The banner ad at the bottom of the main messenger window will stop cycling and will just display the MSN Messenger logo. The text ads in the IM windows will be gone too.
This information is for educational purposes only :)