Thank the gods, system restore point worked!
I uninstalled and checked 'delete ' for my wireless network adapter. I meant to do that to the driver. Oops...
Anyway now it isn't there. Diagnostics tool says 'wireless hardware is not bound to transport driver.'
I have a Lenovo Y50, Windows 8.1
The wireless adapter is/was Intel Dual Band Wireless-AC 3160.
I tried doing Device Manager -> Action -> Add legacy hardware -> Choose from list
But I don't see Intel Dual Band Wireless-AC 3160 listed.
Please help T-T