Windows makes this easy, as long as you're connected to the network. Open Settings > Network & Internet, then click the Change Adapter Options button (in Windows 10) or Advanced network settings > ...
The good news is that on any Mac or Windows device you can locate your saved Wi-Fi passwords in a matter of seconds. It's doesn't matter if for whatever reason you've been booted off your network or ...
hands-on You're at a place you've been before and your Windows laptop immediately remembers the SSID and password for the Wi-Fi network, logging you on automatically ...