Next time the connection is lost, check what the PC's IP address is. Open the Network Connections folder, click the Local Area Connection and look for the IP address at the bottom of the panel on the left per this screenshot click here
With a Belkin Router, the address should be between 192.168.2.2 and 192.168.2.254. If it isn't, try this:
Open a Command Prompt window ("Start > Run", type CMD and click OK) then, at the prompt type...
...and press Enter.