I am running Windows Vista 64-bit and had the computers hooked up to my modem with no problems. The could see each other, I could print from both computers (printer connected to first computer), move files around between them, but now that I hooked up the D-Link DGL-4100, I cannot see them. I cannot transfer files between them, print from the second computer anymore, or do anything between the two. Is there a way I can open the network between these two computers? I am very "dumb" when it comes to networking, so I know it is a setting somewhere that I have not turned on. Please help, I love this router because I get great performance in my games, but why did it lock out my network?