Try uninstall the update which caused this issue and see if problem persist? 
Try visit your device's manufacturer website and see if there is a newer Wi-Fi driver available. 
Are you seeing your Wi-Fi in the Device manager?
Try uninstall the update which caused this issue and see if problem persist? 
Try visit your device's manufacturer website and see if there is a newer Wi-Fi driver available. 
Are you seeing your Wi-Fi in the Device manager?