I have never bothered networking my computers because I have never really had a need. Now that need is starting to arise. My computers are all connected to the same router via LAN and wi-fi but they don’t see each other. What would be the easiest and most non-intrusive (and not too insecure) way to pass stuff between them using the existing set-up? Is Windows Homegroup to be trusted for this or is there a better way?