Updating the Thread:
MSN Messenger 6.1 Released.
http://g.ninemsn.com.au/7MEEN_AU/EN/SETUPDL.EXE
================================================== ===
How to Remove Windows Messenger completely:
Make sure you close Outlook, Outlook Express and the Messenger client.
Run this command in the CMD window (line may wrap, just copy/paste it):
RunDll32 advpack.dll,LaunchINFSection %windir%\inf\msmsgs.inf,BLC.Remove
Note: This will prevent a long delay when opening Outlook Express if you have the Contacts pane enabled. To prevent this, click Start, Run and enter REGEDIT Go to:
HKEY_LOCAL_MACHINE\Software\Microsoft\Outlook Express
Right click in the right pane and select New, Dword value. Give it the name Hide Messenger
Double click this new entry and set the value to 2.