Christine's son has a laptop that has completely lost its Wi-Fi connectivity, but it still works when its hardwired. Leo says that laptops have an Airplane Mode with a function key that will disable the wireless connection. It may be that he accidentally disabled it. They should look in the Wi-Fi settings to see if Airplane Mode is on.
Chuck's wife has a Windows 10 computer that keeps going into airplane mode. He has to go to a restore point just to get it connected. Leo says that there is an airplane mode key -- F2 or the Print Screen key -- and if he accidently hits it, it will put his laptop into airplane more.
Carlos' HTC One turns airplane mode on each time his alarm goes off. Leo says that's odd, but he advises using a third party alarm app to see if that solves the problem. Leo likes Timely.
Leo also says that there could be a setting in a Tasker or Locale app that will do that. So it's possible that Carlos' forgot he had that capability. Otherwise, resetting his phone should fix it.