A common point of confusion for developers deploying to x64 environments is the setting in Visual Studio.
The Visual Studio 2010 Tools for Office Runtime - x64 provides several key features, including:
Since its initial release, Microsoft has continually refined the runtime. The original release (version 10.0.21022, date 07/15/2010) corresponded with Microsoft Office 2010. Over the next 12+ years, it has been updated to fix specific issues, such as character handling problems in Add-in names, and to add crucial features, including , which allowed developers to use more secure digital certificates. The latest stable versions (ending in 10.0.60917) are compatible with Microsoft Office 2019, Microsoft Office 2021, and the subscription-based Microsoft 365 (formerly Office 365), as well as Windows 10 and 11. microsoft visual studio 2010 tools for office runtime -x64-
| Component | Description | x64 Specific Path | |-----------|-------------|-------------------| | | Native shim that loads the .NET runtime into Office process | C:\Program Files\Microsoft Visual Studio 10.0\VSTO Runtime\x64 | | VSTO runtime components | Managed assemblies (Microsoft.VisualStudio.Tools.Applications.Runtime) | GAC (Global Assembly Cache) - 64-bit section | | Primary Interop Assemblies (PIAs) | Interop wrappers for Office applications (when installed with PIAs option) | C:\Program Files\Microsoft Visual Studio 10.0\Visual Studio Tools for Office\PIA\Office14 | | Registry entries for Add-in discovery | Keys under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VSTO Runtime Setup | 64-bit registry hive | | ClickOnce support manifests | For deployment of add-ins via network or web | %LocalAppData%\Microsoft\VSTO |
The "-x64-" in the name indicates that this software is specifically designed for 64-bit operating systems, which means it can take advantage of the increased memory and processing power offered by 64-bit architectures. A common point of confusion for developers deploying
It ensures that if a customized third-party corporate add-in crashes, it won't crash the entire core Word or Excel application.
Loads VSTO add-ins and document-level customizations. Over the next 12+ years, it has been
The runtime is frequently bundled with software that requires it, but it can also be installed manually. Navigate to the official . Search for "Visual Studio 2010 Tools for Office Runtime".
: The runtime follows the support lifecycle of the parent version of Visual Studio or Office it was shipped with. Removal Warning
The is a silent but vital partner in the modern workplace. By providing a secure, stable, and high-performance environment for custom Office solutions, it ensures that businesses can continue to extend the capabilities of their most-used productivity software.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VSTO Runtime Setup\v4.0