Why does Windows show successful configuration but still can't access the internet?
First, please check if the Windows time is correct. Even a clock error of 30 seconds to 2 minutes can prevent a connection, depending on the protocol — see Why can an incorrect system clock prevent VPN connections.
https://time.is/zh/China
Because some clients rely on Microsoft .NET framework, they cannot function properly without this module.
You need to install the .NET framework dependency package, download the module, and install it to resolve the issue.
https://www.microsoft.com/zh-CN/download/details.aspx?id=53344
https://dotnet.microsoft.com/download/dotnet-framework/net472
Some stripped-down versions of Windows 7 may not be able to use the client. To obtain the full version of Windows, please go through Microsoft's official channels.
https://www.microsoft.com/zh-cn/software-download/windows11