networking - Wireless networks not working

I am running Ubuntu 12.10 alongside Windows 7 I can connect to the internet using ethernet but cannot detect any wireless networks. When I use Windows 7 I can connect fine. Any help would be greatly appreciated. The output for lspci -v | grep -iA 10 network was:

02:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
Subsystem: Dell Wireless 1704 802.11n + BT 4.0
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at c0500000 (64-bit, non-prefetchable) [size=32K]
Capabilities: 

lsmod:

Module                  Size  Used by

joydev                 17457  0 
snd_hda_codec_hdmi     32007  1 
snd_hda_codec_conexant    57842  1 
rfcomm                 46619  12 
bnep                   18140  2 
parport_pc             32688  0 
ppdev                  17073  0 
lp                     17759  0 
parport                46345  3 parport_pc,ppdev,lp
coretemp               13400  0 

kvm_intel             132759  0 
kvm                   414070  1 kvm_intel
ghash_clmulni_intel    13180  0 
cryptd                 20403  1 ghash_clmulni_intel
dell_wmi               12681  0 
sparse_keymap          13890  1 dell_wmi
psmouse                95552  0 
dell_laptop            17369  0 
dcdbas                 14438  1 dell_laptop
microcode              22803  0 

snd_hda_intel          33491  3 
snd_hda_codec         134212  3        snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep              13602  1 snd_hda_codec
uvcvideo               76749  0 
videobuf2_core         32851  1 uvcvideo
videodev              120309  2 uvcvideo,videobuf2_core
videobuf2_vmalloc      12860  1 uvcvideo
videobuf2_memops       13368  1 videobuf2_vmalloc
snd_pcm                96580  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 

snd_rawmidi            30512  1 snd_seq_midi
wmi                    19070  1 dell_wmi
btusb                  18334  0 
bluetooth             209199  22 rfcomm,bnep,btusb
snd_seq_midi_event     14899  1 snd_seq_midi
mac_hid                13205  0 
snd_seq                61521  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29425  2 snd_pcm,snd_seq
snd_seq_device         14497  3 snd_seq_midi,snd_rawmidi,snd_seq
rts5139               356158  0 

snd                    78734  16   snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,s    nd_rawmidi,snd_seq,snd_timer,snd_seq_device
i915                  520519  3 
drm_kms_helper         46784  1 i915
drm                   275528  4 i915,drm_kms_helper
i2c_algo_bit           13413  1 i915
soundcore              15047  1 snd
snd_page_alloc         18484  2 snd_hda_intel,snd_pcm
serio_raw              13215  0 
lpc_ich                17061  0 
mei                    40690  0 

video                  19335  1 i915
r8169                  61650  0 

iwconfig:

eth0      no wireless extensions.

lo        no wireless extensions.

rfkill list all

0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

If there are no suggested drivers in the Additional drivers tab:

Before you do this run:

lspci -nn | grep -i network

and make sure the device number matches this Broadcom Corporation Device [14e4:4365]

If that's the case

Download this dkms enabled bcm43142 driver from jas.gemnetworks.com and save it in your Download folder.

In the term run:

sudo apt-get install linux-headers-generic build-essential dkms

then install the package, still in the term:

cd ~/Download
sudo dpkg -i wire*.deb

sudo modprobe wl