I can't believe how hard I tried to look this up and it was clear that I found alot of senario's but not the solution to my issue.  if you are trying to connect a device wirelessly and you continue to see the unable to join network or unable to connect here is what I did that worked:   1.  I went to my router login 2.  I went to wireless devices  3.  I added the device by name and mac address 4.  I was connected...........YEAH.........I have spent hours trying...