AFAIK you have two options. Both have their problems. Option 1. This article states that .NET Framework 4.5 and newer is backwards ... ... <看更多>

NET Framework 4.6.1, 4.6.2, 4.7, 4.8 可能会因为缺少根证书失败. 昨天在一台未联网的Windows 7 SP1 上安装.NET Framework 4.8,报错. ... <看更多>

As I understand it, Windows 7 Build 7600 comes with framework 3.5 but you can download and install Framework 4 from ... ... <看更多>