My Cable provider is doing upgrades to my area, my cable modem never looses sync. I am running Win 7 x64 RC 7100 on 2 different (1 AMD, 1 Intel) PCs connected to wired a router. If my connection to the internet fails I can't connect to my wired router or my network from either machine. I have to close open apps on one of the PCs and then open Network & Sharing center, then click on the warning between the PC and the network icon. After the attempt to connect to the internet fails I can connect to router and my network even though I still have no internet connectivity. This is just bizarre and it happens to both PCs neither can connect to the router or each other until I do this "chicken ritual" on a machine. The NIC connections are Client for MS networks and TCP/IP4. Any ideas? Why does network connectivity lock up?

What sort of applications are you running? Is there a common activity you are doing when this usually happens? Do you have drivers for your NIC cards directly from the manufacturer's site?

Tried both the Nvida driver and the Microsoft one that came with Win 7. Using browser and winamp.

Have you tried enabling IPv6?