Kicad For Windows 7 Page
Version 5.1.x was built specifically with Windows 7, 8.1, and 10 in mind.
You can find these older installers in the KiCad Windows Repository . How to Install KiCad on Windows 7 Kicad For Windows 7
Completely free with no subscription or "lite" version limitations. Version 5
Massive library of tutorials and forum posts specifically for the 5.1 interface. Kicad For Windows 7