Why can’t users run a macro or load an add-in in a document?
If the security level for Word 2000 is set to High, and users open a document or load an add-in that contains unsigned macros, then the macros are disabled and users cannot run them. Users can enable macros that are not digitally signed by changing the security level to Medium in the Security dialog box (Tools menu, Macro submenu), closing the document or unloading the add-in, and then opening the document or loading the add-in again.