How to Manually Remove an Application
Posted by Diane Hancock on 18 September 2017 03:03 PM

This article explains how to manually remove an application when the uninstaller will not remove it.  For example, if an installation program won't install because it says a version is already installed but that version does not show in the Programs and Features, then use these steps.

  1. Remove the application from the registry.  Be careful when editing the registry as you could corrupt the user's system.  Therefore, it is a good idea to create a system restore point and possibly a system backup before editing the registry.  Then, if something goes wrong during the editing process, you can restore their system.

Run regedit.exe

Remove the application's key from the following.  The key location depends on whether the application is a 32-bit application on a 64-bit OS or not.

Keys for 32-bit on a 64-bit OS:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{application’s product guid}

HKEY_CLASSES_ROOT\Installer\Products\<some guid>

To find the "application’s product guid" and the <some guid>, search entries for the product’s name (e.g. Foray Chromatic FFT Filter)

Keys for 32-bit on a 32-bit OS and 64-bit on a 64-bit OS:


You can figure out the right keys by searching for the name of the application (e.g. Foray Chromatic FFT Filter)

2. Delete the files from the installation directory.

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