How to find if computers connected to play LAN?

I'm wanting to play a few games (minecraft, Borderlands 2, Saints Row IV, etc) with my girlfriend and none of the games are popping up in the LAN lobby. Now it has worked a few times it is just not constantly available. We're connecting over the Wi-Fi because her computer doesn't have the ad hoc networking functionality and we don't have ethernet cables. We're running them as administrators and have made sure firewalls are not causing it. We're definitely on the same network and have no idea why these games aren't recognising that. Your help will be muchly appreciated

Could be more of a Server issue than your issue…

If your connecting and not seeing any other users… I would think that's a Server problem.

Just make sure you both are running the same versions of the game and any necessary patches/updates needed.

Also could be your latency… PING any server you want to get the latency to that location/network.