I have a toshiba tablet portege m750. For the first time today the wireless function isn't working. I usually just search for networks to join but only the t mobile one I use with a dongle was listed not the swisscom one I wanted to use in the hotel I am at. FnF8 says that I should turn on the wireless using the switch at the front of the machine. I never turned it off?! I have turned it off closed down and re booted and then switch it back on and nothing has changed. Can you help? Thanks