Hi grosnours,
I seem to recall a few years back where people had trouble related to virtual adapters installed with intrusion prevention software. However, I would not recommend uninstalling any software used to secure your PC unless you only do it temporarily as a test.
There is also the possibility that there is something that is platform specific that causes tabs not to appear. The tabs appearing is one of those things that should just work. I have an 82579LM too, and the tabs work for me. But, every design with built-in network connections is a little different. Do you have the latest BIOS for your PC? The BIOS can make a difference for built-in network connections. You might need to go to whoever made your PC for help.
I wish I had something more to share, but I am out of ideas. Please share whatever you find out here.
Mark H