Some Common Messenger Problems

How To Uninstall Windows Messenger From XP:-

Start>Run>Type in:RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove>Ok

See Here also:-
How to Prevent Windows Messenger from Running on a Windows XP-Based Computer
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q302089

Stopping Messenger from automatically loading with Outlook Express:-

Open Outlook Express>Tools>Options>Uncheck 'Automatically log on to Windows Messenger'.

All Contacts are green in colour as if All Are Online:-
This happens if the updated beta video driver is not fully compatible.Just roll back the driver.

You cannot start Windows Messenger after you install Windows XP Service Pack 2

Start>Run>Type in:Firewall.cpl>ok

On the Exceptions tab, click to select the Windows Messenger check box in Programs and Services.>ok

Check the .NET Service Status Check here first if you are having problems signing in to Windows Messenger or making a voice call to another computer.

Important KB Articles On Windows Messenger Problems Which Are Related to XPSP2

843019You cannot start Windows Messenger after you install Windows XP Service Pack 2

843021 Programs or services that use the Alerter service or the Messenger service do not work as expected after you install Windows XP Service Pack

883261 You are prompted to accept or reject certain Windows Messenger files in Windows XP Service Pack 2


Other KB Articles On Windows Messenger:-
kbAlertz: Windows Messenger Knowledge Base Articles