Cannot connect to Wi-Fi after latest Windows update.

July 9th, my computer was working fine. I had just been on my class discussion board and was logging off getting ready to go to work. It came up with a Windows update. And I clicked restart. I waited for the computer to come back up. I shut it down and went to work.

Came back from work the next morning went to log on and while it was showing that I was connected to my Wi-Fi. Any site that I went to try to go on was telling me I was not connected to the network.

I have tried rolling back the update. But my Wi-Fi connection is still gone. It still shows up that I'm connected. It shows that my device driver is working it says that my network card is working. But I am still not getting to the websites.

I took it up to Best buy to see if they could help me out. They tried with an ethernet connection which worked one time. I would appreciate some kind of help please. I have four weeks left of class before I get my degree and I would really like to be able to finish my class. Thank you very much. Okay so