A: The Visual Studio SDK 2015 is required. Search for “Visual Studio 2015 SDK” on Microsoft Download Center. It contains project templates for creating VSIX packages that target the Isolated Shell.
This is often due to a missing VC++ Redistributable. Download and install: microsoft visual studio 2015 shell -isolated- download
If you have Visual Studio 2017, 2019, or 2022 installed, the 2015 installer may block installation. Solution: A: The Visual Studio SDK 2015 is required
Solution: Repair .NET Framework using the official repair tool from Microsoft, then reboot. Also, ensure Windows Update is running—critical signing certificates may be expired. This is often due to a missing VC++ Redistributable
A: Possibly, but with caveats. The installer may block due to operating system version checks. Use compatibility mode (Windows 8) and install the .NET Framework 3.5 first (via Windows Features). Some users report success; others experience random crashes.