Quite sometime back we had told you on how you can uninstall Windows live applications, using that tutorial you can easily remove any application from the Windows live suite including Windows Live Messenger.
Also See: How to Completely Uninstall Softwares
If you are looking for a easier solution to just uninstall Windows Live messenger a utility called Windows Live messenger uninstaller is what you need.
WLM Uninstaller is a portable software that provides users with a one click option to uninstall Windows Live Messenger.
Clicking on the Uninstall button will completely remove Windows Live messenger from your PC. You do not even have to visit the control panel for it.