I have had a long term problem with my Thinkpad randomly switching off the wireless. I haven't yet been able to discern any apparent pattern as to when or why it does it.
I have recently upgraded from Windows 7 to Windows 8 and the problem still persists.
To resolve it each time, I just need to Fn+F5 and then switch it back on. However, it is irritating and I was wondering if anyone else had encountered this and knew what the solution was?