WI-FI doesn't work (Hard Blocked)

After trying several things, I solved it by reseting the BIOS (Lenovo B570).

When you turn on the computer, press F2 to enter the BIOS, then reset it F9 .

I found this and it worked for me.

This is how to get the wireless hardswitch to turn on using the terminal:

sudo apt-get remove bcmwl-kernel-source
sudo apt-get install firmware-b43-installer
sudo apt-get install b43-fwcutter

Then enter this command to turn it on:

cat /etc/modprobe.d/* | egrep '8180|acx|at76|ath|b43|bcm|CX|eth|ipw|irmware|isl| lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3 |rt6|rt7|witch|wl'

Reboot and see if it stays on.

I just had to push the wireless switch on the side of my laptop some how I accidentally had turned it off. But now its working, gotta watch out for that small mistake. Costs me 2 hours of searching.