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I had essentially the same problem as mentioned here, Cannot locate wireless networks on Acer Aspire M5 laptop But when I got to the sudo modprobe wl step, I got 

modprobe: ERROR: could not insert 'wl': Required key not available

Any ideas on what the key is?

Celestemra
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Turn off secure boot in your BIOS and you should be OK. Secure boot won't let unsigned drivers load, and that's the "required key" error that you're getting.

heynnema
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  • If my answer was helpful, please **vote** by clicking the grey up-arrow icon in the upper-left of my answer, and **accept** my answer by clicking the grey checkmark icon in the upper-left of my answer. Thanks! – heynnema Feb 15 '17 at 20:44