Desperately seeking solutions?

Maybe someone can help me with this. I have several computers, but I like using my MacBook Air around this house. It works fine with the WiFi here when I'm the only one on, but if the other person uses his MacBook (the original MacBook), it breaks my connection. Using the Network Diagnostics application, I can restore my connection, but it will break again, perhaps the every time the other user clicks from one website to another. If I get on one of my older laptops, I don't have the problem. My own old MacBook (original MacBook) interferes with my Air exactly the same way. When we're at our other house, I don't have this problem. I also have this problem at some cafés but not others. How can this happen, and what could fix it?

Sounds like a spotty connection.

Maybe... buy another house?

Heh.