My parents are all up and running on wireless. For some unknown their
big fast fancy router will only connect to their 54 mps laptops at 11
mps. Who knows? My father has a VPN to his company. When it connects to
the company's VPN the company's laptop is set to kill the other network
connections. This is to keep the company's network from being infected
so easily and to prevent back door peepers from spying on the network.
It is difficult to explain why it takes a couple of seconds and a
couple of error messages to go from one network to another.