To remove Windows Messenger from starting everytime, You need to do the following:
To disable the Messenger Service in Windows XP
1. Click Start and then click Control Panel.
2. Click Performance and Maintenance. (If you do not see the Performance and Maintenance icon, You may be using Classic View. You can skip to step 3 below, But you must double-click Administrative Tools.)
3. Click Administrative Tools.
4. Double-click Services
5. Double-click Messenger.
6. In the Startup type list, Choose Disabled
7. Click Stop, and then click OK.
That should take care of it.
Another way to Disable Windows Messenger:
1. Click Start->Run and copy this into the box: ( RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove ) Click OK and MSN will go away.
2. Stop Windows Messenger from Auto-Starting, Delete the following Registry Key:
( HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre
ntVersion\Run\MSMSGS )
3. Uninstall Messenger
You have to edit sysoc.inf (located in /WINDOWS/inf). Under [Components] you should see the following line:
( msmsgs=ocgen.dll,OcEntry,msmsgs.inf,hide,7 ). Take the word 'hide' out of the line, and it should look like this:
( msmsgs=ocgen.dll,OcEntry,msmsgs.inf,,7 ). Exit and save.
4. Go to Add or Remove Programs, and click on Add/Remove Windows Components. There you should now be able to uncheck the MSN Messenger Service, and by clicking Next it will Uninstall.