The only way I know, is to use a firewall program that monitors outgoing traffic (I believe that the Windows XP version only monitors incoming traffic). I don't have any programs that try to phone home so I don't use any PC firewall software - my router takes care of the incoming traffic - that and AntiVir for other pests. http://www.321download.com/LastFreeware/page26.html#Sygate Personal Firewall