Network and Sharing Center behaviour

Hi

I went to my network card and changed in advanced settings not to auto negotiate, and to be at 1GBit/Full Duplex

After I done this the network map on "Network and Sharing Center" just disappeared it says "view your basic network information and set up connections"

But everything seams to be working

I then removed the LLDP, an tried to install it, but it does not let me, it says access denied

I removed the network card and re-installed it and it installs without LLDP protocol, but still all seams to be working properly.

Any ideas why is this happened?