compuco,

If you're really feeling adventuresome here's a thread with HTRegz showing how to do it with registry tweaking and myself posting a link to a thread that shows how to use a hexedit procedure. These were primarily for slamming port 135 closed, however, a lot of the info should apply to all ports. It's not for the faint of heart and I would recommend firewalls and shutting services off thus closing the ports, but what the heck, you might want to try it on a box anyway.

http://www.antionline.com/showthread...osing+port+135