Thanks but those instructions don't seem appropriate for my installed version of Skype (18.104.22.168). I do not see any checkbox relating to "enable uPnP". Instead, all I see in the 'connection' area is a field for "Use port xxxxx for incoming connections", plus a drop-down and 4x fields relating to proxy connection (Host/Port/user/password).
I am still having the problem with Skype disconnecting my wireless (before I am successfully connect to the Skype server).
Also, I have noticed that after this happens, my computer doesn't shut downreboot cleanly. Instead, I am getting a black screen with white text. Here are some of the lines which I wrote down:
ath: Failed to wake up in 500us
ath: Chip reset failed
ath: Unable to reset Channel (2412 Mhz) reset status -22
(Is there some sort of way I can access the full version of this text, such as a Linux log file, so I can post it here for you to see?)
After I press enter a few times on this screen it comes up with the message saying "caught shutdown signal", and then reboots.
However, when the machine gets back to the Linux Mint 13 username/password screen, I find that my USB mouse does not work at all. And the green light of the TP-Link USB wireless adapter is stuck on solid green (rather than flashing). The only way I have found to get around this is to unplug the wireless adaptor, which seems to serve to 'reset' the USB functions of my motherboard, and allow the mouse and wireless adapter to work as normal the next time I reboot the machine.