Minimize all programs.
Right-click the desktop in an open area (not on a shortcut).
Click "Settings" tab
In the center, see the drop-down box labeled "Display" and click the down pointer.
Click on your TV, (it may say "non-plug and play monitor")
Click the box that says "Extend my Windows desktop onto this monitor"
Click "Identify" and a number should appear on both monitors.
click Apply, click OK.