Maybe this will help.
QUOTE
Since I installed Messenger Plus! on my computer I get spammed, why?
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Messenger Plus! now comes with an optional sponsor program. This program will show ads from time to time on your computer and will change your start page in Internet Explorer. In NO case this sponsor is mandatory. If you don't want it, simply uncheck the sponsor box during setup. If you installed it be error, just uninstall Messenger Plus! (which will trigger the sponsor uninstall program) and reinstall without the sponsor.
Important: if you wish to get rid of the sponsor program, you must uninstall Messenger Plus! from the usual Add/Remove program window. Don't worry, you'll be able to reinstall it later and chose not to install the sponsor anymore. If you start deleting files on your own you will prevent a full system restore as some of the files copied by the sponsor are backups of your original configuration files.