Technically, it is . Users have reported "Entry Point Not Found" errors because these versions look for functions in api-ms-win-core-path-l1-1-0.dll , which does not exist in Windows 7. While some community "hacks" exist to port these DLLs, they often lead to frequent crashes and data loss. Summary of Benefits (Version 5.1.12)
Projects created in 5.1 can be opened in newer versions later if you eventually upgrade your OS. Kicad For Windows 7
While the latest versions of KiCad have moved toward supporting modern operating systems, it is still possible to run this powerful, open-source PCB design suite on Windows 7. The Compatibility Gap Technically, it is
Starting with , the development team officially dropped support for Windows 7. This version and all subsequent releases (like KiCad 7 and 8) require updated system libraries and graphics drivers that are often unavailable or unstable on older Windows environments. The Best Version for Windows 7: KiCad 5.1.x Summary of Benefits (Version 5
Massive library of tutorials and forum posts specifically for the 5.1 interface.
Even as an older version, it includes the 3D viewer, Push-and-Shove router, and extensive component libraries.