Click the "Start" menu button. Click "Ableton," then "Live 8." Click the "Live 8" icon to launch the program.
Click the "Start" menu button again, then click "Computer." Navigate to the folder containing the first music file you want to put into Ableton Live 8.
Click the music file to highlight it, then press "Ctrl" and "C" simultaneously. Click the Ableton icon in the taskbar to switch to Live 8.
Right-click inside an empty clip slot in the "1 Audio" channel. Select "Paste" from the context menu that appears to put the music file into Ableton. Repeat the process for any other music files that you want to put into Ableton.