In the Office Add-ins dialog. click My Add-ins tab to view your add-ins or click Store tab to explore add-ins for your PowerPoint. Select the add-in and click Add. Review the information and then click Continue to activate that add-in.

Require Application Add-ins to be signed by Trusted Publisher Check this box to have the Trust Center check that the add-in uses a publisher's trusted signature. If the publisher's signature hasn’t been trusted, the Microsoft 365 program doesn’t load the add-in, and the Trust Bar displays a notification that the add-in has been disabled. ...

To use add-ins you already have, select My Add-ins. The add-ins you'll see will depend on the kind of Microsoft 365 subscription you have. Get a VBA add-in such as Solver or Analysis ToolPak. On the Tools menu, select Excel Add-ins. In the Add-Ins available box, select the add-in you want, and then click OK.

Note: The steps to install the 2019, 2016, or 2013 versions of Office Professional Plus, Office Standard, or a stand-alone app such as Word or Project might be different if you got Microsoft 365 through one of the following: Microsoft Workplace Discount Program (formerly known as Home Use Program): If you bought Microsoft 365 for personal use through your company, see Install Office through ...

Windows Media Player plug-ins. Desktop themes and wallpapers Visualizations are colors, shapes, and patterns that move to the music in Windows Media Player Now Playing mode. Plug-ins or add-ons add functionality—such as audio effects or DVD capability—to Windows Media Player.

Select My sign-ins or select the Review recent activity link from the My sign-ins block. Expand and review each of the sign-in items, making sure that you recognize each one. If you find a sign-in item that doesn't look familiar, change your password to protect the account in case it's compromised.

For Windows 10.The Windows DVD Player app is available free for a limited time for people upgrading to Windows 10 from Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows 8, or Windows 8.1 with Windows Media Center.

Important: New name for apps for Office - Office Add-ins. We are currently updating our products, documentation, samples, and other resources to reflect the platform name change from "apps for Office and SharePoint" to "Office and SharePoint Add-ins". We made this change to better distinguish the extension platform from Office apps (applications).

COM Add-ins are typically used to automate Excel in response to a click of a CommandBar button, a form or dialog box, or some other event specific to Excel such as opening or closing workbooks or entering data on worksheets. COM Add-in functions cannot be directly called from cell formulas in worksheets.

Add-ins have access only to the data in the email message that you're working in. All add-ins are validated by Microsoft, including those that you install from the Office Store. For more information, see the privacy statement and the terms and conditions section in the add-in’s consent form.