While attempting to charge and sync my iPod I received the message that 167 songs could not sync. After identifying the songs I checked and they are all functioning properly on my iPod. However, they cannot be found on my computer. All the information is there but the actual musical file cannot be found and cannot be played on the computer. I am asked if I want to locate them but I have no idea where or how to begin. Must I reinstall all those songs or is there someway to find them?