A previous .NET installation is corrupted. Fix:
Download .NET Framework 4.7.2 Offline Installer for Windows 7 (64-bit) net framework 4.7.2 windows 7 64 bit offline installer
Right-click the file and select Run as administrator . A previous
Microsoft offers two primary types of installers. Understanding the distinction is crucial for a smooth experience. net framework 4.7.2 windows 7 64 bit offline installer
Guide to .NET Framework 4.7.2 Offline Installer for Windows 7 (64-bit)
Always use official Microsoft sources to avoid security risks. The 4.7.2 package is a "multitargeting" installer that works for both 32-bit and 64-bit versions of Windows 7.