– Bluetooth – 3.110, causes problems as well. One report says that the companion Bluetooth driver, Marvell Semiconductor, Inc. Several of the reports say that Wi-Fi fails entirely, at both 2.4GHz and 5GHz. Not surprisingly, there are problem reports now online for almost all of those Surface products. Looking at the Surface firmware/driver updates, I see there were new 'Marvell Semiconductor, Inc. When I try to connect to the 5GHz, it says: 'Unable to connect to this network.' Uninstalling the wifi driver, and restarting the device did help me get the 5GHz connection back to my Surface Book, but when i decided to try to install the same driver again, and try to connect to 5GHz again, the same 'Unable to connect to this network' appears. – Net – 3.110', and after that update, I can't connect to a 5GHz wifi connection, I can only connect to 2.4 GHz.

I updated the wifi driver to 'Marvell Semiconductor, Inc. I’m seeing various reports like this one from sleong261 on Reddit :

Microsoft released a big bunch of Surface firmware/driver updates last week and the complaints are rising.

Surface pro 3 wont update