Regarding your concern, please do the following to install the prerequisites for Staz:
1. From your Control Panel → Programs and Features → Uninstall the 2010 and 2017 Microsoft Visual C++ Redistributables.
2. Download all of the following Microsoft Visual C++ Redistributables, and install them one by one:
- Microsoft Visual C++ Redistributable 2010
- Microsoft Visual C++ Redistributable 2010 – 32-bit (x86) Download
Microsoft Visual C++ Redistributable 2010 – 64-bit (x64) Download - Microsoft Visual C++ Redistributable 2017
Microsoft Visual C++ Redistributable 2017 – 32-bit (x86) Download
Microsoft Visual C++ Redistributable 2017 – 64-bit (x64) Download
3. Download the Microsoft .NET Framework 4.5 from this page, and proceed with installing it.
4. When you are done doing all of the steps above, restart the server.
This should solve the issue your end-user is having, so please try and keep us posted with the results.