I have a Dell PC that is connected to my router via ethernet cable. When I power up my pc it connects to the internet fine and then at random points just loses connection. It is still sending & receiving packets when it is in this state. The only way I can regain connection is to shut down & reboot. It used to be absolutely fine and has only started doing this in the last month & it driving me crazy. I have AVG installed and have tried disabling firewall but still happens. I have a laptop that connects to the internet wirelessly and this is fine and is still connected when my pc isn't.