If you are following an old guide or video telling you to download 4.0 manually, – that advice is obsolete and dangerous.
Do not download “.NET Framework 4.0 v30319” from anywhere. Instead, turn on .NET 3.5 (if needed) and ensure .NET 4.8 is installed via Windows Update or Microsoft’s official download page. Download Net Framework 4.0 V 30319 Windows 10 64 Bit
It looks like you’re asking for a of a search query or a potential download for ".NET Framework 4.0 version 4.0.30319 on Windows 10 64-bit" . If you are following an old guide or