This article explains how to manage your Wi-Fi settings if you want to disable Wi-Fi auto-connect. Disabling Wi-Fi auto-connect is a good idea because connecting to an open Wi-Fi network, such as a free wireless hotspot, exposes your computer or mobile device to security risks.
Computers and mobile devices work differently, but turning off automatic Wi-Fi connections is easy on all devices.
Disable automatic Wi-Fi connections in Windows 10:
Go to the Network & Internet settings.