remove windows messenger chat service
Make sure your Internet Explorer, Outlook Express, Windows Messenger and other programs are closed before doing this.
1) Click on Start, Run
2) Type the following (or cut and paste it) into the Run line
RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove
3) Click on OK
You will have to reboot for it to fully work.