Windows XP installs with msn messenger as a default. An old version of this client that is just taking up resources. To get rid of this pesky little thing go to the start menu, choose “Run” and type:
RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove
…in the “open” box and klick ok.
An advanced inf-installer window will popup, and then prompt you to restart. Voila, messenger is gone!