When you open a presentation with a macro, VBA, or other software code, PowerPoint displays a security warning (New!) to let you know the presentation might contain potentially harmful code that may harm your computer. If you know and trust the author of the presentation, you can change security options to enable the macro content and use the presentation normally. If you don't trust the content, you can continue to block and disable the content and use the presentation with limited functionality. If you don't want a security alert to appear, you can change security settings in the Trust Center in PowerPoint Options. Open a Presentation with Macros
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