To ensure your Office extensions work correctly, follow these steps to secure the official download:
While there are 32-bit (x86) and 64-bit (x64) versions, the VSTO Runtime installer is typically a multi-architecture package that detects your system needs automatically.
The Microsoft Visual Studio Tools for Office (VSTO) Runtime 2010 Redistributable is a critical software component required to run Office-based solutions built using Microsoft Visual Studio 2010, 2012, 2013, and later. If you use custom Excel add-ins, Outlook plugins, or Word automation tools, this runtime acts as the bridge between the .NET Framework and your Office applications. What is the VSTO Runtime 2010? To ensure your Office extensions work correctly, follow
The VSTO 2010 Runtime requires the .NET Framework 4.0 or higher. If you are on a modern version of Windows 10 or 11, you likely already have a compatible version of .NET, but it is worth verifying if the installer fails.
If you have multiple versions of the runtime installed, the 2010 Redistributable is designed to coexist with older versions (like VSTO 2005 or 2008), so you do not need to uninstall previous versions to make it work. Why the 2010 Version? What is the VSTO Runtime 2010
Supports Office versions from 2010 through Office 365.
Provides the necessary infrastructure for VSTO Add-ins and document-level customizations. If you have multiple versions of the runtime
Even though it is titled "2010," this specific redistributable remains the industry standard for VSTO development. It has been updated continuously by Microsoft to support modern environments. It is the "universal" engine for virtually all modern VSTO-based business tools used in enterprise environments today.
A small installation that runs silently in the background once configured. How to Download and Install
Includes components that verify the digital signatures of add-ins before they are allowed to run.