Hey guys for those of you who still have a problem with the wifi ...this is what i did to get it working
(Solution 1)
Go to device manager....
Under network adapters
Right click Broadcom Netxtreme Gigabit Eithernet and uninstall it.
Then at the menue bar click search for hardware changes It should come back.
(Solution 2 ) worked for me!
Under other devices
Right click Network Controler and Click update driver.
Hit browse my computer for driver soft.
Let me pick from a list of dev...
Scroll down to Netword adapters
Under Manufacture... Scroll down to Broadcom.
And under Model install Broadcom 802.11n network adapter (Broadcom)
Hope it works for you :)