ok this is what i have come up with so far, that dll is needed by limewire and frost wire, that dll is used by my sprint pcs connection. if i rename the file i get a message "Limewire was unable to initialize and start. This is usually due to a firewall program blocking LimeWire's access to the internet or looback connections on the local machine. Please allow LimeWire access to the intenet and restart LimeWire." same message for for frostwire but names reversed so i will see about updating that software and see what it will do.