Suspicious application and setup file

[Mariojp]

Good Morning.
I have recently developed an application using C # and visual Studio 2017.
When i execute the application, the Avast scan appears because it detects it as suspicious. At the moment it says that it does not have a virus and the program runs correctly.
On the other hand, I have also generated a setup file using Inno Setup. When I run it, the Avast scan jumps several times in the installation process, which is generating rejection among my clients.

Please, I need help to fix it ...

Thank you very much in advance.

[Asyn]

As you're a developer, read here...

-> https://support.avast.com/article/229/
-> https://support.avast.com/article/228/

[Mariojp]

Thanks!!

i will try it...

[Asyn]

You're welcome.

[Mariojp]

Good morning.
The software meets all the points of the posts. The only possible conflicts that occur to me are:
   
    Landing page:
        I've not web page. The software cannot be download. It's installed "in situ" by the seller.
    Signing software:
        I've signed for testing and the result is the same.

[Mariojp]

Hello.

I continue getting the avast popup the first time i execute a the application.

I've signed it with a Comodo Certificate.

Any idea?