( You may skip the below content and learn how to uninstall Facebook Messenger manually! )
This forum thread contains clear, and easy to understand instructions on how to uninstall Facebook Messenger (aka, Messenger) from Windows 10 and Mac. This post also contains extra tips, but has also been written in such a way so that you can remove the Messenger app, thoroughly. Please complete the steps in the correct order and, please back up all of your personal stuff (e.g., documents, bookmarks, etc.) before continuing. If you're very uncomfortable making changes to your operating system manually or following the directions given blow, please STOP and run the recommended uninstall tool PRO accordingly.
In order to get rid of Facebook Messenger on Windows, please follow these steps:
Step 1: Exit the app. We kindly refer you to the below screenshot.
Step 2: Uninstall the target app from your own app list under Settings. Please refer to the following 4 images.
Step 3: Please wait while the Messenger app is being uninstalled.
Step 3: Try detecting and wiping all instances (leftovers & components) of Facebook, such as installation information that has been left in file system and/or Registry Editor.
And, to erase Facebook Messenger from your iOS, Windows Phone, and/orAndroid phone, please refer to this post for details.