Actually I was just thinking If the key itself is the problem you can turn the wireless on and off from the command line. But first you need to know the wi-fi name. Go to Control Panel select Network and Sharing Center click on 'change adapter settings' and look to see what your wi-fi connection is called mine is called Wireless Network Connection 5 so my example will use that name - you use whatever the name of yours is.

right click on command prompt and select 'run as administer'

type this on the command line and then press enter:

netsh interface set interface "Wireless Network Connection 5" admin=enable

this should turn it on (Hopefully the key will go from orange to blue - but if the key is bad - the light may not work - check to see if you're connected.

typing this:

netsh interface set interface "Wireless Network Connection 5" admin=disable

should turn it off if the key changed to blue with the first command this should change it back to orange.