Visual Studio 2010 Tools For Office Runtime Download [updated]: Microsoft

Yes, if you use any Office plugins. Even though it says "2010," this runtime is still required for modern software. It is backward compatible, meaning it handles plugins made in 2010 and newer ones too.

Office 2010, 2013, 2016, 2019, 2021, and Microsoft 365. Yes, if you use any Office plugins

| Issue | Likely fix | |-------|-------------| | “Cannot install because a newer version exists” | Uninstall newer VSTO runtime (only if old solution requires 2010 version). | | Add-in fails to load after install | Repair VSTO runtime via Control Panel → Change → Repair. | | Missing .NET Framework error | Install .NET Framework 3.5 SP1 or 4.x first. | Office 2010, 2013, 2016, 2019, 2021, and Microsoft 365

microsoft.com/en-us/download/details.aspx?id=48217 File: vstor_redist.exe Use only if: You need to run a legacy Office add-in or customization built with Visual Studio 2010/2012/2013 targeting Office 2007–2016. Avoid if: You can rebuild the solution with the VSTO 2013 runtime or a modern Office Add-in (web) instead. | | Missing

It includes trust prompts and security checks to ensure that only authorized code runs within your Office environment.

You can download the paper in PDF format from the following link:

Visual Studio 2010 Tools for Office Runtime (x86 and x64) – KB 2764593