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After many unsuccessful searches, I post a message to find a solution to my problem. I have a C# Windows service that has been running for many, many years without any problems. This service is an interactive service that displays an HMI. However, in recent months, I have more and more problems under Windows 10 and Windows Server 2016 that refuses to launch the service interactively.

When the service starts I get the following error message:

Displaying a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application.

I checked the value of the variable "Environment.UserInteractive" directly in C#, it returns "false".

In addition, when I check the configuration of the Windows service the box "Allow the service to interact with the desktop" is checked.

I do not understand where the problem comes from and especially where can I search?

I am on a C # Framework .NET 4.6.1 application and under Visual Studio 2015.

Thank you in advance for your assistance !

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  • Interactive services are obsolete. You have to have an app running in user context. If you also need a service then you need two processes. stackoverflow.com/q/4237225 Commented Jun 19, 2019 at 14:50
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