

If by any chance there is no log file, or if there is no record of the changes made to the registry, there is a high chance that the uninstaller will fail.In other words, it deletes all the copied files, all Registry keys created and so forth. The uninstaller goes through the log file and reverts all the changes done during the installation.

When you attempt to uninstall the program through the Add/Remove tool, Windows is trying to find the registered uninstaller inside the registry and execute it. The installation program puts this file in the application’s folder together with the uninstaller.

During the installation process, all these operations for installing are stored in a special log file.This is where the Windows Apps and Features tool looks for installed programs. The installer is taking is to add a key to the Windows Registry.If you install it you will also be able to open Microsoft Word documents. Let’s take Microsoft Words as an example. For example, if a shared library needs to be registered or if certain types of files need to be associated with the program being installed. The installer can make changes in the Registry.

Same goes for any applications or OS components that use this database. This is a database where the settings and options for the operating system are stored.
