I have a user who uses a Surface Pro with Win 8.1. He is having trouble connecting to a wireless network. This wireless network sometimes shows up and then just disappears from the list of available networks. He was connected to it fine until a few days ago. It does not show up as a saved profile on his system and his other devices (laptop, iPhone) can connect to it just fine. I've updated the drivers to the latest, Feb 28, 2014. He's using the Marvel wireless card.