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Disable firewall and the antivirus temporarily.Make sure network discovery is turned on on the computer trying to see the other computers.Device Manager Eliminate 6to4 garbage# Go to Device Manager and expand Network Adapters.# Click view from top and select show hidden devices.# Look at the adapters, if you see a long list of 6to4 Adapter, right click on them and delete all of them except 1.# Once you have only 1 of these adapters left, reboot.