Jesus, it seems every day there's a new issue with my SP3 now.
Now it can't connect to my router, if I try to set up a fixed IP it does connect to the network, but still don't get internet activity.
It wasn't the firmware update as I used it all day with no issues yesterday, and it also doesn't seem like a driver issue because it connects to my cellular... It doesn't seem to be anything wrong with my router either, because every other device is connecting with no issues.
I just came across this info:
http://www.windowscentral.com/rolli...gs-driver-allegedly-fixes-bsods-surface-pro-3
Perhaps that's what's happening to you?