When Windows 10 can't connect to a network, there could be many reasons:
Other causes for Wi-Fi network connectivity problems include incorrect settings for Windows 10 apps and overwhelmed internet access points. Since there are so many potential causes, you'll need to walk through a variety of fixes to uncover the problem and resolve it.
Verify that it is indeed a Windows 10 problem. If you can’t connect your Windows 10 computer or tablet to wireless, check to see if you can connect any of your other devices to the same network.