This is the story of the offline installer.
If you have several Windows 7 machines to update, you only have to download the file once. Key Features of .NET Framework 4.5.2 net framework 4.5.2 offline installer for windows 7
For a dedicated offline Windows 7 machine running legacy software, the 4.5.2 offline installer is reliable, lightweight, and trouble-free. For general use, go with .NET 4.8 (still fully compatible with Windows 7 SP1). This is the story of the offline installer
This is often caused by a corrupted Windows Update cache. Try stopping the "Windows Update" service, deleting the files in C:\Windows\SoftwareDistribution , and restarting the service before trying the installer again. the 4.5.2 offline installer is reliable