Gateway laptop wireless connection gave out

My wireless connection has given out and repairing the connection does not work. It shows the network in the Network List but I am unable to connect. My wireless button is on and I have tried to turn it off and back on several times. I connected via an ethernet cable and that works. I have not installed or removed any new programs recently either. A sweep of my computer shows no abnormalities. Any suggestions? Thanks.
 
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