Forgive my all caps, I am more than angry right now. My computer was working fine and then I get this message every time I log in to upgrade for free to Windows 8.1, true I should have read about it before doing it. I am not that good with computers but I know my way around. I know how  to do simple troubleshooting, so you can't tell me to reboot!

Here's my problem: I have no internet connectivity whatsoever!!! My PC runs on wifi. There is no wifi option, there is nothing to click that could to tell me to enable or disable or enable wifi. Now, tell me how am I going to use this computer? There is NOTHING on my adapter settings except "ethernet was unplugged". You should run your updates on 1000 computers of your own before you lure people into your updates that you're not certain is going to work. This is just not cool. I was fine with Windows 8 and you had to do this thing. I wish there is a way to undo the install but I know there isn't. 

I hope you understand my tone of frustration, I did not ask for this. 

you probably need to update your nic driver, a lot of devices that worked with windows 8 require a driver update to work with windows 8.1 including network interface controllers, audio devices, video devices, and even chipsets

The new drivers would be missing.. Go to Device Management and Update your network Apdapter Drivers.

this may help you