A quick web search for the missing DLL file will lead you to many "DLL download" websites. Downloading a single .dll file from an unknown source is dangerous and can introduce viruses or malware to your system. The correct, safe, and Microsoft-recommended solution is to install the entire VSTO runtime package from the official source.
The vstor_redist.exe is the primary method, but here are some alternative ways the VSTO runtime could be installed, usually in more advanced or enterprise scenarios:
If you search online for microsoftofficetoolscommonv90 download 2021 , you might find: microsoftofficetoolscommonv90 download 2021
Understanding microsoftofficetoolscommonv90: How to Find and Install It Safely
Search for and download the . Select the version matching your system architecture: x86 for 32-bit operating systems/applications. x64 for 64-bit operating systems/applications. A quick web search for the missing DLL
How to Download and Install Microsoft.Office.Tools.Common.v9.0 for VSTO (2021/2022 Update)
If you encounter an error stating that Microsoft.Office.Tools.Common.v9.0.dll is missing, even after installing the runtime, here are a few things to check: The vstor_redist
Rogue .exe files disguised as Office tools can compromise personal data.
Move the configuration.xml file you created in Step 1 into this exact same C:\Office2021 folder. Step 3: Run the Command Prompt to Pull the Source Files
