This indicates that the Quicktracks plug-in was not completely installed and that Windows Installer believes there is still work it needs to complete. The message that pops-up when you run other programs is there as a reminder that the installation process is not complete.
For whatever reason this problem exists, the solution is the same. Download and install the Quicktracks updater. Once this file is on your computer, run the installer. It will complete the installation and fix the problem. You should no longer receive the message about the QuicktracksPlugin.msi.