If you have downloaded the installer but the error persists, follow these steps:
If you are trying to run older software, custom database applications, or legacy enterprise tools, you might encounter an error regarding a missing component named . This file is a specific dynamic-link library (DLL) or registry component associated with legacy Microsoft Visual Studio Tools for Office (VSTO) and the Office 2007/2010 runtime environments.
Option 1: Install via the Unified VSTO Runtime Redistributable
The assembly is a critical framework component used by developers to build and run Visual Studio Tools for Office ( VSTO ) add-ins. It allows custom solutions to integrate seamlessly into legacy versions of Microsoft Word, Excel, and Outlook. microsoftofficetoolscommonv90 download 2021
Are you trying to (like a "Missing DLL") or are you developing an add-in for a specific version of Office? Knowing your goal will help me find the exact package you need. Visual Studio Tools for Office Runtime Lifecycle Policy
What (e.g., 2010, 2013, 2016) is installed?
| What you likely want | Safe action | |----------------------|--------------| | Microsoft Office 2021 | Buy / download from Microsoft.com | | Office activation tools | None – use genuine license | | Visual C++ runtime | Download from Microsoft’s VC++ page | | A known "common tools" pack | Doesn't exist officially | If you have downloaded the installer but the
Click to save the ODT executable ( officedeploymenttool.exe ).
Download authentic updates directly via the Microsoft Learn Answers Portal or the main developer center. Essential Technical Security Advice
When a specific component like this goes missing, it is tempting to search for a quick standalone download link. However, grabbing isolated system files from third-party hosting sites poses severe risks. It allows custom solutions to integrate seamlessly into
Packages bundled on independent file-sharing sites often contain adware, spyware, or trojans.
Corrupted registry paths that can break your current Office installation.
microsoftofficetoolscommonv90 is typically an internal Office install/update component rather than a user program. In 2021, treat such files cautiously: prefer official Microsoft downloads, verify signatures, scan for malware, and use Microsoft’s repair/uninstall tools if you encounter problems.
Run the installer as an Administrator and follow the prompts. 2. Enable .NET Framework 3.5 (Includes v9.0 Components)
Choose your device architecture: or 32-bit (x86) .
