[xtopher]

My daughters Tosh lappy lost her connection overnight. After weeks of frustration and a bit of ingenuity on her part we discovered that her wireless driver had been automatically 'updated' and on closer look at the settings ie Channel number found it wouldn't let us designate an alternative. We rolled back the driver and bingo it worked instantly; the channel was allowed to be changed by the router to the best one. If this isn't the answer it's a little more knowledge to put in your problem file! Hope this helps.