My acer will not connect to my wireless network. Im on another laptop and the wireless is fine. it says connect ethernet

[Hopegina]

No wireless connections are showing up, i tried pushing FN and F3 and nothing shows up either. I went to device manager and there is a yellow pyramid with an exclamation mark next to Atheros AR5B15 wireless network adapter and next to Teredo Tunneling Pseudo-Interface.

 

[Clayto1332]

Double click the Atheros wireless adapter in device manager. Does it have an error code listed? Does it give you the option to roll back driver? If you can, roll back driver and see if that fixes the problem.