As of 2025, Microsoft still hosts the .NET Framework 4.5.2 offline installer for legacy systems. Use these exact pages:
The .NET Framework 4.5.2 is a highly compatible, "in-place" update to versions 4, 4.5, and 4.5.1. Many legacy business apps and older creative software titles specifically target 4.5.2 to ensure stability on Windows 7 SP1. Prerequisites for Windows 7