Network And Sharing Center Extremely Slow When Initializing New Connection (Tethering/dongle)?

Windows 7 N&S center is really slow. I have no idea what's causing it.Symptoms not present when I connect to my wireless router.But when I tether (get a connection from a USB device) the N&S Center stops responding for about 10 minutes.At some point, it will come up with the "Public Network?" box.How can I debug this?Even after the network is initialized, the N&S center is still very slow.I assume it's doing some automatic something or other that keeps pinging this, that or the otherThe USB device would serve an internet connection that has a reasonably high latency.Lots of network tools seem to slow down, especially while the connection is configuring itself. This is probably because all of the services involved are interlinked somewhere, and are waiting on the same mutex to be released or something.