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This is the first public version of the Windows Live Messenger Uninstaller (v0.01).

What the tool does is basically remove a broken Windows Live Messenger installation. It really uses only the windows installer (msiexec.exe) to do the job combined with the CLSID of the installation that uniquely identifies the WLM version.
The symptoms might be that when you want to reinstall the application it might say that it is already installed, while actually it is not. When trying to remove it with the usual Configuration – Add/Remove software steps, it might not even appear in the list, while the setup of the WLM says it is really installed.

I decided to build this tool since there are a lot of people strugling with this problem [1][2][3][4]. All these existing solutions presented by people on these sites use the single command with a CLSID key (eg. msiexec /x {B1403D7D-C725-4858-AACC-7E5FA2D72859}), but since the key is different for each WLM version such a solution might only be useful if you have that exact version. It can also be done manually by changing the registry keys, but I thought this would speed up the work significantly since there might be a lot of keys to search in (The location we are talking about here is: [HKEY_CLASSES_ROOT\Installer\Products\])

I heard of people formatting the entire hard drive because of not being able to resolve this, so I really hope this gets around and avoids a lot of headaches.

You can download this first version of the tool below.

Download binary | Download source code (pascal)

MD5 hash binary: 7525a442da4b4515c8166debfc4a4d01
MD5 hash source code: 28efa8f882c5354c6c4845393724e99a

Requirements
The tool is tested on Windows 7, but should also work on XP and Vista.

Usage
The tool is very simple to use. If it finds an installation it will give you the uninstall command that you can use to manually remove it. You can also press RUN and it will run the command automatically for you.

Note: This software comes with absolute no warranty! By using this program you agree that I am not responsible for anything caused by this software whatsoever.

Future releases
If you have any comments, suggestions or bugs, please put them here in the comments. If it is useful I might add/fix it in the next release.

Currently I’m planning to build a more general remover for the Windows Live series, since there are also other components that could get broken.

References
[1] http://ask-leo.com/how_do_i_uninstall_windows_messenger.html#comments
[2] http://ayumilove.wordpress.com/2009/03/14/how-to-install-remove-windows-live-messenger-2009/
[3] http://www.mydigitallife.info/2006/02/11/remove-and-uninstall-windows-messenger/
[4] http://www.vistax64.com/live-messenger/185883-cannot-uninstall-windows-live-messenger-beta-2009-a.html

Untrue descriptions on other sites linking to this page
The link to this topic is already published on several sites, but unfortunately the presented description of the tool is misleading. For it says that I’m claiming to have a better tool than all the other existing solutions, which is of course not true. This is only another alternative that may solve the problem.
In my description I was only referring to the existing solutions presented on the topics and comments on these that I used as references (see above [1][2][3][4]) and not on any other existing tool that probably uses other methods.

Softpedia certification

The tool can now also be downloaded from Softpedia.

Related posts:

1. “Show my webcam” not available and grey webcam during video call problems in Windows Live Messenger 14.0.8117.416
2. Enable transfers/sharing of files with potentially unsafe file types in Windows Live Messenger
3. Windows Live Essentials Offline Installer
4. Large file sizes after compiling with Lazarus