I keep seeing this question asked in forums “I updated to windows 8.1 now I cannot connect to my WiFi“.
Sometimes the wireless will say limited or no access
This is a common issue particularly with laptops with Atheros Wi-fi cards.
Now to fix this it is usually a pretty simple fix, go to the manufacturers website and download the correct drivers for your model of laptop and Windows 8.1. Once you have downloaded the latest driver install it.
This is caused because you are using a driver that is not compatible with Windows 8.1.