Just today my wifi connection disappeared on my laptop. Last time it happened I simply rebooted and that fixed it; didn't work this time. Laptop went to sleep, usually upon waking wifi will take a few seconds to connect, but this time no dice. Checked settings -> updates & found a pending windows (10) system update. Fortunately, I have an ethernet cable, so connected it to my laptop, downloaded/installed the update, clicked "restart," & when finished went to wifi settings to check available networks, found both my networks (2.4 GHz & 5 GHz), clicked/checked both to connect, and viola wifi access was back.
Never had this happen before. My cell was still connected to wifi so was able to check availability troubleshoots, but they looked a bit too complicated for my comfort. I was fortunate applying system update fixed my issue. Maybe this might help someone else, hopefully.