Hello.

As a local administrator, try the following and see if it helps:

Start/Run/GPedit.msc

Navigate to: User configuration/Administrative Templates/Network/Network Connections/

The two keys you will be examining are named "Prohibit access to properties of components of a LAN configuration" and "Prohibit TCP/IP advanced configuration".

I'm pretty sure I saw a TechNet article about this a couple of years ago. I'll see if I can find it and send it to you. As I remember there were a couple of causes and remedies mentioned in the article.