Kicad For Windows 7 -

Ensure your Windows 7 is updated to Service Pack 1 (SP1) . Without it, many of the C++ redistributables KiCad needs will fail to install.

Version 5.1.x was built specifically with Windows 7, 8.1, and 10 in mind. 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. Ensure your Windows 7 is updated to Service Pack 1 (SP1)

Projects created in 5.1 can be opened in newer versions later if you eventually upgrade your OS. Kicad For Windows 7