Well, my last post was all you really needed to interpret. I don't see any problem with uninstalling one optional update, unless someone in your household did in fact occasionally type with Japanese, Chinese, Tibetan, or Korean characters (or in another language requiring complex characters and symbols).

If your brother thinks it would be unsafe to uninstall that update (it is from Microsoft after all, of which he had to trust in the first place), a valid reason for why would be appreciated as the uninstallation would only affect MSN Messenger and it would still work as usual. Although if it's because the update can't easily be uninstalled from where I specified, that's a different story.

I don't know what else to say if your brother won't change his mind. I'll try to find another solution in the meanwhile.