you want to uninstall it?...
.one method is to disable or set it to manual,...in the services in administrative tools
but to uninstall it do this,...i presume youre running XP..
choose start, run...and type c:\windows\inf\sysoc.inf
this will open a text file that hides some programs from the add/remove programs folder.
find a line that starts with "msmsgs=" and delete the word "hide"...just delete it...and don't put or add space or sumthin.
save the file and open control panels add/remove programs...and click window components button. scroll down the programs and you'll find windows messaging waiting for you to uncheck it.