Do you have Windows 2000, XP or 2003? Note that the ink redistibutables and the handwritting plugin only work in those versions of Windows. It you're using Windows 98 or Me, you should uninstall them (you can also disable the plugin).
mood changer: I haven't heard about it before (or not sure), but if it's a plugin for plus (as it seems), try to disable it in the plugins section of the preferences of plus and then restart messenger.
There are some plugins that doesn't (still) work with Msg Plus! 3.
That should solve your problems
btw, please, note that it's msg plus, not msn plus
/ 
