Hello, this situation may be caused by the lack of necessary runtime in your system. You can refer to the following methods to try to install! ~

Open 360 Security Guard-Software Manager and search ". Net "and click one button to install. You can try to install multiple versions. If it cannot be installed, the system will give the corresponding prompt.

Restart the computer after the installation, and then check whether the problem still exists in the system. I hope my answer is helpful to you!