If MP3Gain will not start and you get a message about a missing file (probably MSCOMCTL.OCX or MSVBVM60.DLL), please go back to the MP3Gain home page http://mp3gain.sourceforge.net and download the "full" installer. Run this program, and the needed Microsoft system files will be installed on your computer. If you later download a new version of MP3Gain, you will NOT need to download the "full" version again. The "normal" version will be all you need.