Warning: If you do not have administrative rights to the machine you are using you may not have access to the control panel.  If you do have administrative rights but do not see the control panel in your start menu or are not sure if you have administrative rights SELECT>START>RUN and type in the run field "control panel" without the quotations and hit Enter.

Step 1: 

Select START on your task bar then select Control Panel.

Step 2:

    Option A: If you see this  Control Panel window in classic view:  double-click  Network Connections and skip     to step 3.

Note: If the Control Panel window does not appear like this, please skip to option B.

Step 2:

    Option B: If you see the Control Panel window in category view select  Network and Internet Connections.

Step2: 

     Option B:

        Part 2: Select  Network Connections.

 Step 3:  Double-Click  Local Area Connection.

Step 4: Select the Support tab.

Step 5: Select  Details.

Your MAC address is listed as your "Physical Address" under properties in the Network Connection Details window.

The MAC address of the above machine is 00-18-8B-54-21-21. 

Other Examples of the same address may look like this : 00:18:8B:54:21:21  or 00188B 542121.

Note: Dashes, hyphens and colons are not actually part of the MAC address; they are just put there to make human reading easer. 

Note: MAC addresses are different for each network device.  If your machine has more than one ethernet card, a wireless card ,or any other networkable port, you will have more than one MAC address.