Musicmatch Jukebox 10 is not compatible with windows 7 >>http://www.microsoft.com/windows/compatibility/windows-7/
MusicMatch Jukebox 10 was designed to be used on older 32-bit operating systems like Windows XP.Note that MusicMatch Jukebox 10 is also no longer being developed, so it is unlikely that these problems will be resolved in future.
Before proceeding with installation of Musicmatch Jukebox 10, you need to look on your Windows 7 PC for any previous versions of Musicmatch Jukebox. If you've already tried installing version 8, for example, then you need to run a complete uninstall, not to mention a good clean up of the registry.Use Revo uninstaller to uninstall and clean any registry trash ,revo uninstaller can be downloaded on the link below:http://www.revouninstaller.com/revo_uninstaller_free_download.html
Once you have done this, or if you had no earlier versions of Musicmatch Jukebox installed, you will need to download and install the only suitable version.Download and Install Musicmatch Jukebox 10 on Windows 7 >>http://musicmatch-jukebox.com/
Once downloaded, right-click the installer file and select Run as Administrator. Next, you will need to OK the first of many warnings that the file is incompatible with this version of Windows.Proceed through the installer, clicking Next at each option.When you come to the registration page, click the option to not register and also claim to be under 13. Click Next to complete more steps of the installation, changing the location required for your Music folder if necessary. Musicmatch Jukebox 10 will add files and playlists to this location.As the installer finishes, you will be prompted to install the Yahoo! toolbar. You will need to deselect this.A successful installation should result in more incompatibility warnings. Ignore these, but agree to reboot your PC. Next right click Musicmatch Jukebox icon and select properties > compatibility >check run this program in compatibility mode for: (Windows XP) click apply ->ok.