: After this date, you will no longer receive security updates for these tools, which could expose your system to risks.
Click to download and install the required VSTO SDKs and design-time assemblies. Troubleshooting Common Errors "Platform Toolset (v90) Not Found" or Missing Reference
If an installer throws an error mentioning missing common tools or failed v90 keys, use these steps to resolve the issue: microsoftofficetoolscommonv90 download 2021
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The term “microsoftofficetoolscommonv90” is not a legitimate software product or a security update. Instead, it refers to a missing component, a registry artifact, or a file dependency from a legacy Microsoft Visual C++ Redistributable package (specifically the Visual C++ 2008 SP1 – version 9.0, or “v90”) that certain older Office tools or third-party add-ins rely on. : After this date, you will no longer
. This DLL is required for running Office solutions created with older versions of Visual Studio. Stack Overflow How to Download & Install (2021/Current)
If you are a developer, this runtime is often included when you install the Office/SharePoint development workload in Visual Studio Microsoft Learn 2. Installation Steps Navigate to the Microsoft Download Center This link or copies made by others cannot be deleted
runtime. If you are seeing an error related to this while using Office 2021
VSTO is a set of development tools that allows programmers to create custom code that runs inside Microsoft Office applications (like Excel add-ins or Outlook plugins).
In rare cases, a specific legacy tool – such as an old ERP integration or a custom VSTO add-in – explicitly requires the exact version of microsoftofficetoolscommonv90.dll that came with Office 2007.