First of all welcome to the forum and to Ubuntu.
I had the same issue with my laenovo B560 but got it solved. The problem is a wifi driver from acer which disables the wifi switching from the system. So here is my solution.
There are two way of doing this first do the temporary one.
After the above steps your wireless starts to work then make it permanent by doing this,
sudo rmmod -f acer-wmi
sudo rfkill unblock all
rfkill list all
Add the below line to the end of the file
gksudo gedit /etc/modprobe.d/blacklist.conf
Proof read this before saving and if everything is ok then save it.
Now do this
Just before the word end put this
gksudo gedit /etc/rc.local
Proof read it twice if ok save it.
Now reboot your system, once you log in your wireless should work with out any problem 'cos this solved my issue.
Hope this helps and cheers.