No additional device is needed to find out the password of your currently active Wi-Fi connection if you forget it. Right-click on the Wi-Fi icon in the notification area of the taskbar and select Open Network and Internet Settings from the local menu. Select the Wi-Fi category in the left column and click on the Network and Sharing Center link in the Related Settings area on the right to open the corresponding area of the classic Control Panel.
WiFi
How can I configure Windows not to scan for higher priority wireless networks?
Windows 10 remembers every wireless network you’ve ever connected to, saves the access data, and prioritizes them based on different characteristics (signal strength, throughput, etc.). If it connects to a WiFi network that doesn’t have the highest priority, Windows 10 searches in the background for a WiFi network with a higher priority, which uses unnecessary power. But this is very easy to change.