Please Help

i had lime wire...have a feeling that something in my computer was deleted from harddrive... and i still have all of the limewire files except the exe file...... when i try to redownload i get a broken quicktime symbol and it says that i am missing software that is needed that "unfotunaltly cannot be found on the quicktime server" i have no idea what software is missing..... limewire was running just fine.... can anyone help me please?