Yeah. All of the PC's in our house connect by wireless.
Its pretty much random, can happen at any time.
Na nothing that i can think of, it just started occurring occasionally and then became more frequent, we even replaced the router to try and fix it, virgin sent us a new one, but it didn't make a difference.
I've tried with 2 different wireless adapters, alternating between USB ports, but the same problem still occurs.
I had it downstairs at one point next to the wireless router to see if it made a difference and it was the same, my laptop has no connection issues when in the spot that my pc is in, so its likely not to be that.
most of the time i have 3/2 bars of signal on my PC.
The wireless channel setting is set to automatically select the best channel.