How To Enable Missing Local Area Network Connection Icon In Windows 7

There are several situations comes when you want to connects to the Ethernet using wired or cable, but it's can't work because the Ethernet LAN icon is not showing in your computer.
In other word LAN (Local Area Network) icon is missing in adapter setting at networking and sharing center window.

Is my computer have something wrong?
Don't worry, your computer is absolutely okay and not to do any action like restore or format your system.

Is my LAN wired cable is not working properly?
It may be yes or no. Cross check your LAN cable on other working computer that was successfully connected to wired Ethernet.

What is the reason of not showing LAN icon in my network & sharing center in my computer?