restore default security permissions in windows vista?

Whilst trying to make notepad++ the default notepad I tinkered with the
I changed the settings so that any user listed had full control over my
PC. Now I want to change them back & only allow the Administrator to
have full access. How do I do this please? :cry:


Before you criticize someone, walk a mile in their shoes. That way if
they get angry.............they're a mile away...........shoeless! :D