XP

  1. Click  Start  ->  All programs  ->   Accessories -> Command Prompt

    ipconfig1eng
  2. Type in “ ipconfig/all ”  and press enter key
  3. Find the MAC address next to the label Physical Address  
    ipconfig2eng

 

Windows 7

  1. Click  Start -> Command Prompt 
     w7ipconfig1eng
  2. Type in “ipconfig /all” and press enter key
  3. Find the MAC address next to the label Physical Address 
    w7ipconfig2eng