Please provide make/model of your computer. Is it a desktop PC or laptop/tablet? Is it a self-built PC you built yourself? Or an OEM computer (Dell, Acer, HP, Toshiba)?
Laptops still come with a Wi-Fi switch, which often gets turned off if you remove it from your home and travel with it somewhere. The process of putting the laptop into a carrying case and then taking it out again multiple times can easily move the switch to the off position where you will disable your laptop's Wi-Fi and thus won't get any list of Wi-Fi networks to popup on your windows screen to connect to! Here's an example of what that switch looks like:
Other laptops, most modern ones have done away with that physical switch and use a keyboard combo of 2 or more keys to enable/disable the wi-fi radio inside of your laptop as pictured here:
Enabling your Wi-Fi switch by sliding a physical switch or using a combo keystroke will usually solve this problem.
If it doesn't, then you may have anything from a failed driver from a recent Microsoft or other update on your computer, to a failed hard drive. If you get to this point, you should consider testing your hardware. You can use this free
TROUBLESHOOTING GUIDE I wrote to help you available here:
Windows 10 - Unclickable Task Bar Let us know how you get on.
Best of luck,
<<<<BIGBEARJEDI>>>>