Please tell me what happened to my EXCEL! As described below (since the security level is set to high and there is no digitally signed trusted certificate attached,
Open word, Tools-Options-Security-Macro Security, change "Intermediate" to "Advanced" or "Advanced Security" to "Very High", and then remove the check mark in front of "Trust all installed add-ins and templates" in "Reliable Publishers" to restore word to its previous state.