First guess without any specific experience with your computer is that your av or firewall software is freaking out.
Usually uninstall/reinstall will solve if that is the case.
It's also possible some core system files were damaged when windows was updating.
That's also easy to check though. SFC /SCANNOW Command - System File Checker
^just follow those instructions for that one.
As always with connection issues.
Turn off the computer.
Unplug modem (remove battery if it has one)
Do something else that takes about five minutes.
Plug in the modem wait until it fully connects and cycles
Plug in the router give it time to also fully set up.
Reboot the computer.
That specific order is the best way to get any junk settings cleared from all the connection related devices.