Comment 1 for bug 1779864

This becuase that is how windows works. For newer window's a so called manifest file is needed.

As mentioned in the wx API doc, it links to:
https://docs.microsoft.com/en-us/windows/desktop/SysInfo/operating-system-version

Which states:
* For applications that have been manifested for Windows 8.1 or Windows 10. Applications not manifested for Windows 8.1 or Windows 10 will return the Windows 8 OS version value (6.2). To manifest your applications for Windows 8.1 or Windows 10, refer to Targeting your application for Windows.

I don't really know how to do this with exe's not build with msvc.