Microsoft Visual Studio 2010 Tools For Office Runtime Download Portable Guide

If you are not constrained to a legacy VSTO 2010 solution, consider:

To check if the runtime is installed:

Yes, if you use any Office plugins. Even though it says "2010," this runtime is still required for modern software. It is backward compatible, meaning it handles plugins made in 2010 and newer ones too. If you are not constrained to a legacy