Just for fun, I setup an old PC (HP box with Pentium 4 3.2 Ghz, 2 GB RAM and 160 GB HD) and installed Linux Mint. The motherboard has the built in Ethernet port, but I wanted to use WiFi. So I plugged in the Edimax USB that I had laying around. Mint recognized it, but it didn't work quite right (would not maintain a connection but for a few minutes).
Did a bit of searching and found several comments about this issue. Some where helpful, some not. Finally found this post that briefly outlined the steps to update the driver - and now it's working much better!