What are the installed .NET versions?
トラブルシューティング

To know which versions of the Microsoft .NET framework are installed on your Windows PC, you can download and run our tool.

DotNetVersions.exe

It will print the version, for instance:

2.0.50727.4927 Service Pack 2
3.0.30729.4926 Service Pack 2
3.5.30729.4926 Service Pack 1
4.0.0.0
4.8.03752

If you don't see the 4.8 version, please install the Microsoft .NET framework.

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