Classic 7 is a Windows 10 LTSC mod to look 1:1 to Windows 7
Summary
Classic 7 is a Windows 10 LTSC 2021 modification designed to resemble Windows 7. The page lists features carried over from Windows 7 (Aero Glass, themepack support, gadgets, Windows Media Center, and UI elements) and notes several features not ported from Windows 7 (Flip 3D, certain system apps) while offering downloads via mirrors and linking to a GitHub repo. It positions the project as a fan-made effort unaffiliated with Microsoft, with credits and downloads clearly provided.