New
#11
Sometimes the uninstall application in Control Panel > Programs and Features leaves behind "bits and pieces" of the program you're trying to uninstall. That could prevent a newer version of the program from installing correctly. Since each company knows exactly how their program is coded and how it installs in the operating system, they can build an uninstaller that removes all of those "bits and pieces". Adobe is not the only company that has uninstallers. Many makers of antivirus programs, drivers, etc also have uninstallers.
Ultimate List of Uninstallers