Even as an older version, it includes the 3D viewer, Push-and-Shove router, and extensive component libraries.
Version 5.1.x was built specifically with Windows 7, 8.1, and 10 in mind. Kicad For Windows 7
Ensure your GPU drivers are up to date. KiCad’s "Accelerated Canvas" uses OpenGL, which can be buggy on the default "Generic" Windows 7 drivers. Can you run KiCad 6 or 7 on Windows 7? Even as an older version, it includes the