Seems as if windows 7 is at it again with installing unnecessary adapters. This fix addresses the inability to RDP & browse UNC shares due to excessive 6to4 adapters appearing in Device Manager. To view these pesky things, open Device Manager and show hidden devices. Then expand Network adapters. If you see any 6to4 adapters, and would like to remove them. Download devcon.exe from microsoft support, then run this command. "devcon remove *6to4mp" This process may take a while, especially if you have 100's of them.