I haven't seen any follow-up on your original note that wife's laptop couldn't find any wifi, not just your own, and would not even try to find one. As so many people here have wifi unless you have an isolated home out in Fenney, there should be many networks detected by the laptop. That is what makes me suspicious the problem is in the wife's laptop not your router. My laptop now is showing 7 networks other than my own.
Here is a google
search that gives many suggestions of things to try:
laptop won't search for wifi - Google Search