problem at beginning of songs

[myautigirl]

Hi, Some of our songs when we play them right at the beginning makes a skipping sound when they start. We thought it might have needed the windows update or the computer needed to be defrag, so we tried both and we are still getting the same problem. It is more like a hesitation, kind of like the computer is bogged down but the song sounds like it is skipping and its not. Has anyone else had this problem or does anyone know what this is and how to fix it?
Thanks,
Shelley