Don't use Microsoft Anti-spyware... it's still a beta (not a final version) and gives lots of false warnings... It will detect Messenger Plus! even if you didn't install the sponsor. As the other guys have told you, the sponsor is optional and won't install if you choose not to.
Check How to uninstall ad-ware/sponsor if you need more information.
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![[Image: userbar452797dd.gif]](http://img218.imageshack.us/img218/216/userbar452797dd.gif)
