so after the install the thing that is left is the WiFi support so here it goes
first disable the bcm43xx driver
sudo rmmod bcm43xx
then black list the driver by adding “balcklist bcm43xx” in
sudo gedit /etc/modprobe.d/blacklist
then download diswrapper-utils-1.9 deb file and install it offline or if you have a LAN connection, For the next step you should have a copy of the windows driver on HDD or flash drive and type
sudo ndiswrapper -i /the location of windows driver/bcmwl5.inf
now check if driver is there or not
sudo ndiswrapper -l
you should get a output like
bcmwl5 : driver installed
device (14E4:4312) present (alternate driver: bcm43xx)
then type
sudo ndiswrapper -m
to write wlan0 to ndiswrapper, then you need to start ndiswrapper type
sudo modprobe ndiswrapper
Now you just need to enable ndiswrapper to start on boot, for that add “ndiswrapper” in /etc/modules
sudo gedit /etc/modules
all done enjoy

Ankur Shrivastava