Hi Judy
The issue is that currently ANYONE can actually send you a message through
the .NET Messenger network without being on YOUR contact list!
You can change this so that people will have to add you to their contact
lists before they can send you a message (which will have the effect of
blocking these Spam messages in the future).
To Disable Messenger Spam - simply:
Open up the main Messenger window, click Tools, then Options, then the
Privacy tab, click All users and then click the Block >> button.
This way you can manually add who you want to receive messages from and
block all others.
Some links for your to consider:
Messenger Service Window That Contains an Internet Advertisement Appears
http://support.microsoft.com/?id=330904
Enable or Disable Internet Connection Firewall in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;EN-US;283673
NB: AOL is not compatible with Windows XP Internet Connection Firewall (ICF)
If you have AOL, you should contact AOL and/or get a 3rd party firewall.
http://www.microsoft.com/windowsxp/pro/using/howto/communicate/stopspam.asp
Stopping Advertisements with Messenger Service Titles
http://www.fracas.net/newsgroups/generaladvice.html
Spyware, Popups, Anti-Virus & Firewalls