In my search for fixing the issue I posted here, How to set wifi driver settings to prefer 5 GHz channel above 2.4 GHz, I thought that it might be a good idea to update the drivers.
I have a "Intel 82567LM Gigabit Network Connection" and "Intel Wifi Link 5100 AGN" I went to search for linux drivers. I then found this driver, http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=15817&lang=eng&OSVersion=Linux*&DownloadType=Drivers. I installed it. Now after a reboot I find out my network connection is broken and can not get access to internet anymore. It seems the driver is incompatible :(
Now is it possible to fix this issue? Or might it better just to reinstall ubuntu?