Mach 4 version 2.0.4162 installer shows error if you have a non-ASCII characters in Windows user name and doesn't start the installation process. When I have created a new user account without such characters than the installer worked fine.

This behaviour was observed on :
Mach4 : 2.0.4162 Hobby installer
OS : 64-bit Windows 10 Home (version 1903)
Processor : Pentium G4560
RAM : 8 Gb
Motherboard : Asus H110T