I am supporting a person remotely whose machine is doing something I haven't seen before. What I have noticed is that whenever I make any change whatsoever it locks me out of the machine and she has to unplug the network cable and reconnect it in order to get back on the Internet. There is nothing of use in the event logs other than DNS lookups failing.
I have assigned a static IP to it and this seems to do away with the requirement of unplugging and reconnecting, but any change still knocks out network connectivity for 30-60 seconds before it returns.
Any ideas? TIA