unable to install b43 firmware

[revant]

Actually,my ubuntu 9.1 was running smoothly but now it gives a message to install b43 firmware and a site name to install it.I could have installed it but ubuntu just get stuck after that message.Is there anyway to install through windows?Please help

[Feeyo]

Hi,

If you have internet:

apt-get -y update
apt-get -y install bcmwl-kernel-source
reboot

If you do not have internet:
CDROM/DVD

Step 1. Install the bcmwl-kernel-source package using the Synaptic Package Manager. First select Add CD-ROM from the edit menu to enable the install media as a package repository, then click on Reload to refresh the available packages list, ignore any internet/download errors. Now search for the bcmwl-kernel-source package and install.

Step 2: Under the desktop menu System > Administration > Hardware Drivers, the drivers can be activated for use.

Note: A computer restart may be required before using the wifi card.

LiveCD/LiveUSB

For temporary use with the LiveCD and LiveUSB environments, simply use the Synaptic Package Manager to search for and install the bcmwl-kernel-source package. Refer to Step 1 and Step 2 of the CDROM/DVD instructions above.

Step 3: Instead of a computer restart, in a terminal issue the following commands:

~$ sudo modprobe -r b43 ssb wl
~$ sudo modprobe wl