Uninstall messenger plus instructions
http://www.msgplus.net/help_tutorial...tall-uninstall
What Yahoo programs were you removing? If it's freezing it could be something interrupting the uninstallation process.
Personally I would stop it loading at windows start up and reboot, go into control panel, add remove programs, uninstall it.
If that fails let us know what it is you are removing and we'll look for more information for you.