This points to corrupted system files. Run the System File Checker:
https://download.microsoft.com/download/F/9/4/F942F07D-26C2-4A30-9075-1BBD148B3C01/NDP462-KB3151800-x86-x64-AllOS-ENU.exe Download Microsoft Net Framework 4.6 2 Offline Installer
Almost always, . .NET Framework is backward compatible. An application built for 4.6.2 will generally run fine on 4.8 without any changes. Only in very rare scenarios with deprecated APIs would you need to force an installer. This points to corrupted system files
Your downloaded file is corrupted. Delete the installer, clear your browser cache, and re-download from the official Microsoft link. Always compare the file size. clear your browser cache
It avoids installation failures caused by unstable connections during the download phase. Key Features of .NET 4.6.2