Related registry entries of the program are corrupted.Some of the program files have been deleted mistakenly.Windows OS is unable to locate the default uninstaller of the program.Garmin MapSource was not properly or completely installed previously.If you are unable to completely uninstall Garmin MapSource, the cause could one or more of the following situation: Why You Fail to Uninstall Garmin MapSource Today let’s see how to correctly uninstall Garmin MapSource in Windows, and I’ll also list the possible reasons that you can’t complete the removal. One of the most common problems computer users encounter is that a program can’t be removed. How You Can Safely Uninstall Garmin MapSource - Removal Tutorials