Quote Originally Posted by Reverend
Go to Control Panel > Administrative Tools > Services
Scroll down the menu and right click Messenger, then click the Stop button.
Change the Startup type to disabled and click apply.

Open Outlook Express
Go to Tools > Options. On the General tab uncheck "automatically logon to Windows Messenger." Click OK.

How to prevent Windows Messenger from running on a Windows XP-based computer
Thats the thing,I have already done both of these things when i first installed the fresh copy of XP,I checked again yesterday and they are already disabled yet they still show up in Task Manager as egghead said above.