HOW TO BLOCK MICROSOFT MESSENGER SPAM:
 
 
The most important fundamental in Internet security is this: Block every incoming service except those you explicitly need.
 
If you've followed this fundamental rule in implementing your Internet security, you should already have the offending Messenger ports blocked. If you're still receiving Messenger spam, you either have your computer connected directly to your ISP without using a firewall, or someone on your LAN is broadcasting Messenger spam.
 
 
Blocking Microsoft Messenger spam with a firewall:
 
In order to stop Messenger spam you should block these ports with your firewall:
TCP ports 135, 139, and 445
UDP ports 135, 137, and 138
 
 
Blocking the Messenger Service within your Operating System:
 
Windows NT/2000/XP
 
1. Click on the Start button and open the Settings/Control Panel folder.
2. Open the Administrative Tools folder, and double click on Services.
3. Scroll down to Messenger and double click on it.
4. Select "Startup type: Disabled" and click the "Stop" button to stop the service.
5. Click "Apply, and then "OK".
 
 
 
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