Even though Visual Studio 2010 is outdated, you may still encounter a need for this runtime when installing or running legacy Office solutions.
The is a set of components required to run Office add-ins and document-level customizations that were developed using Visual Studio 2010 (or earlier versions like VS 2008 with VSTO). microsoft visual studio 2010 tools for office runtime
In simple terms, the Microsoft Visual Studio 2010 Tools for Office Runtime is a support package. It is required to run software add-ins built using Visual Studio 2010. Without this runtime installed on a user's computer, any custom Office plugins created with these tools will fail to load. It ensures that your custom ribbons, task panes, and document automation scripts function correctly within the Microsoft Office environment. Even though Visual Studio 2010 is outdated, you
The Microsoft Visual Studio 2010 Tools for Office Runtime (VSTO 2010) is a set of development tools and runtime components that allows developers to create custom business solutions using Microsoft Office. It acts as a bridge between the .NET Framework and Microsoft Office applications, enabling the creation of application-level add-ins and document-level customizations. It is required to run software add-ins built