Most Windows 7 machines are 64-bit; look for the x86_64 installer (approx. 1.2 GB).
You can find these older installers in the KiCad Windows Repository . How to Install KiCad on Windows 7 Kicad For Windows 7
If you are sticking with Windows 7, is the final stable release that offers full, native compatibility. It remains a robust tool for professional-grade schematic capture and PCB layout. Most Windows 7 machines are 64-bit; look for