The is a critical software component required to run Microsoft Office-based solutions built using Visual Studio 2010 and newer versions. Specifically, the x64 version is designed for 64-bit editions of Microsoft Office, acting as a communication bridge between the .NET Framework and Office applications. What is the VSTO Runtime?
Windows 7 SP1, 8.1, 10, 11, and various Windows Server editions (2012, 2016, 2019).
You must have the .NET Framework 3.5, 4.0, or newer installed first.