I have set up a static ip on the windows 7 side through network configuration. I have to have both sides have ips of our local network, in order to connect to our domain and use some programs that are just not mac happy. I set the network up as bridged and all works great at first. Then I get no error messages, but I don't have internet on either side. I have to shut down parelles, turn off my airport and then turn it back on again. I used chat, but we did a fresh start up of parelles and of course it worked. They had me change my bridged settings to default. About 5 minutes later I lost internet again.