: Ensure Microsoft .NET Framework 4.6 or higher is installed.

This indicates that the custom tool’s own components are missing, not the shell itself. But if the shell is partially corrupted, reinstall it. Also, run the dependent tool as Administrator once to register COM components.

(for developers): 👉 https://www.microsoft.com/en-us/download/details.aspx?id=48158

The Microsoft Visual Studio 2015 Shell -Isolated- is a powerful and lightweight development environment that provides a subset of the full Visual Studio features. It is ideal for developers who need to create, test, and deploy applications without requiring the full range of Visual Studio features. With its streamlined interface, faster installation and updates, and lower system requirements, the Visual Studio 2015 Shell -Isolated- is a great tool for a variety of use cases, including development of small to medium-sized projects, scripting and automation, and student and educational use.

: Microsoft strongly recommends upgrading to Visual Studio 2022 for better security and AI features like Copilot.

The Visual Studio 2015 Shell (Isolated) can be downloaded from the official Microsoft website. Here are the steps to download and install: