Date: 2024–2025 (Retrospective Analysis) Subject: Compatibility and Lifecycle of Microsoft .NET Framework on Windows 7 Operating System Audience: Developers, IT Administrators, Legacy System Maintainers 1. Executive Summary Windows 7 reached its End of Life (EOL) on January 14, 2020 . However, many legacy enterprise and industrial systems continue to run on this OS. The .NET Framework versions compatible with Windows 7 range from .NET Framework 3.5.1 (in-box) up to .NET Framework 4.8 (the last supported version). No version of .NET 5, 6, 7, or 8 (modern .NET Core/+) is supported on Windows 7. 2. Supported .NET Framework Versions The following table details .NET Framework versions that officially support Windows 7 (including SP1 and non-SP1 where noted):