problems after updates

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http://ubuntuforums.org – After making the updates my wifi suddenly stopped working. After going through various posts i realised it may be because of bcmwl-kernel-source upadation from bcmwl-kernel-source ( to I removed the new version and tried installing the previous version, but could not. i ended up only in installing the new version. I am unable to connect to my home wifi in the ubuntu12.04. I am able to connect to wifi in windows. Please help. (Hardware)