( You may skip the below content and learn how to uninstall Microsoft Security Essentials manually! )
This forum thread contains clear, and easy to understand instructions on how to uninstall Microsoft Security Essentials (MSE) from Windows. This post also contains extra tips, but has also been written in such a way so that you can remove the Raptr software, 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 MSE on Windows, please review this video:
Part 1: If you're running a Windows 7 computer, try these instructions.
Step 1: Uninstall the target app from your own programs list under Control Panel. Please refer to the following 4 images.
Step 3: Try detecting and wiping all instances (leftovers & components) of MSE, such as installation information that has been left in file system and/or Registry Editor.
Part 2: If you're still using the OLD Vista system, read on - The uninstall process is almost the same as the outlined steps above.