Lack of administrative privileges or antivirus interference. Fix: Disable third-party AV and use the built-in Administrator account. Ensure the TrustedInstaller service is running.
Microsoft .NET Framework 4.7.2 offline installer for Windows net+framework+49+offline+installer+for+windows+exclusive
or unauthorized modified software. Because Microsoft never released a version 4.9, these "exclusive" packages are fraudulent and can compromise your system's security. How to Check Your Current Version Lack of administrative privileges or antivirus interference