Seems like a repeated question, but I am not able to find the answer within the question database, so I'll begin with what adapter I have:
lspci | grep Network:
06:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
eth1 IEEE 802.11abg ESSID:off/any Mode:Managed Access Point: Not-Associated Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04.2 LTS Release: 12.04 Codename: precise
EDIT 3: Wireless networks are detected, but unable to connect to any.
EDIT 4: I have Dual booting into windows 7/XP and Ubuntu, Being both Windows able to >connect normally to any wireless.
Connecting to multiple WEP connections after configuring a Shared WEP Key / After updates seems to have broken the authentication, and it always keeps asking out for the key even though it's correct. I could connect to wireless perfectly with the base 12.04 installation with "Updates while installing".
I have the jockey Broadcom STA drivers activated.
EDIT 4: Source of 1st edit: How to Install Broadcom / STA Wireless card (BCM43XX)
EDIT: bcmwl kernel source is already to the latest version; linux-libc-dev, libc6-dev, linux-headers-generic, linux-headers are as well; blacklisting doesn't help either with ndiswrapper; removing with modprobe is not working either
EDIT 2: Reinstalling bcmwl-kernel-source, as stated in How do I get my BCM43228 card working in mainline kernel 3.4 or higher? outputs:
sudo apt-get install --reinstall bcmwl-kernel-source
Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded. Need to get 0 B/1,301 kB of archives. After this operation, 0 B of additional disk space will be used. (Reading database ... 185120 files and directories currently installed.) Preparing to replace bcmwl-kernel-source 22.214.171.124+bdcom-0ubuntu0.0.1 (using .../bcmwl-kernel-source_126.96.36.199+bdcom-0ubuntu0.0.1_i386.deb) ... Removing all DKMS Modules Done. Unpacking replacement bcmwl-kernel-source ... Setting up bcmwl-kernel-source (188.8.131.52+bdcom-0ubuntu0.0.1) ... Loading new bcmwl-184.108.40.206+bdcom DKMS files... Building only for 3.2.0-38-generic-pae Building for architecture i686 Building initial module for 3.2.0-38-generic-pae Done. wl: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/3.2.0-38-generic-pae/updates/dkms/ depmod.... DKMS: install completed. update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.2.0-38-generic-pae