If you need an additional language pack (e.g., if your copy of Windows uses more than one language setting, or if you switch from one language setting to another after you've already installed the VSTO runtime), you can find the language packs at. Note that the installer will automatically configure VSTO to use the same language as your copy of Windows. This is an update to previous versions of the runtime, formerly available at This download installs the Visual Studio 2010 Tools for Office Runtime, which is required to run Microsoft Office based solutions built using Microsoft Visual Studio 2010, 2012, 20.
