Hi all, I have Win 7 RC1 x64 installed, upgraded my vista OS. I however have a very irritating problem that network connections goes dead. It shows an exclamation mark in the botton right corner. To fix it to work again I have to disable that particular network card and then enable it again for any traffic LAN or internet to flow through my switch. I have read a previous thread that states that one must go and change you registry for that particular NIC to DhcpConnForceBroadcastFlag = 1. That did not work for me. I tried installing the latest drivers via windows update, told me that I have the latest drivers. I installed the latest Nforce drivers, although for Vista x64, but still it didn't work. I have a ASUS Striker Extreme Board, 6 GB Mem en E6600 Core 2 Quad. Any suggestions or help will be much appreciated. Regards, Oh, I forgot. I have found that the network connection are most likely to die when I try to play LAN or Internet games.

I managed to fix my problem, by removing all VPN programs from my system installed prior to upgrading from Vista. I then went about to uninstall the NVidia Network tools and drivers also installed prior the upgrade to win7. I then opened control panel, opened Device Manager, right clicked on my network interfaces and uninstalled them. I then restarted and Windows 7 RC1 installed drivers for my NVidia NICs again. Since then I haven't had any problems with my NICs loosing connections. I'm not sure if the uninstalling of the VPN programs helped, but that was I did. It just might be that you only need to uninstall your NICs, but just in case I mentioned what I did as a process. Good luck and I hope it helps someone.

I too am having the same problem. I am running a Dell M6400 with the Windows 7 RC1x64 OS. It definitely occurs when I'm transferring data over the LAN on our domain. This data transfer usually deals with a product called Autodesk Vault which is a SQL based document management application for CAD files (Specifically Inventor data). I've also had this problem when I try to copy large quantities of data (more than two GB) over the network from our file server to my computer or an external HD connected to my computer via an ESATA connection. Any help would be greatly appreciated.

Check the NIC driver again. See my own answer on Windows 7 - network shares are not available after wakeup It seems like Microsoft is shipping shaky drivers for very common chips like Realtek. What is worse windows update does not tell you there is a better one available and insist to reinstall the old faulty one once you have managed to get the latest and working one installed!