.NET 4.5.2 requires Windows 7 to have SP1 installed. If you don't have it, the installer will block you.
The .NET Framework 4.5.2 is the "Goldilocks" version for Windows 7—it’s stable, supports a massive library of software, and the offline installer bypasses the connectivity headaches common with aging OS versions. net framework 45 2 offline installer for windows 7 top
Ensure the "Windows Update" service is not disabled in services.msc , as the .NET installer uses this service to register the software. Final Verdict supports a massive library of software