How to mark application as suspicious

Question

I have a .NET application written in C # using Visual Studio 2012. I promote the application through my own website and have it available for download. When you download it in Chrome, I get a message that my application "usually does not load and can be dangerous." In addition, when I download my application and execute it, Avast sees it as suspicious and wants to run it in the sandbox.

In any case, can I prevent this (without buying a certificate for signing)? I do not want potential users to encounter this problem.

Edit: I am not doing anything malicious or using any hooks in my application. The application is a small simple tool, as you can see here.

Answer 1

Either you sign the code for the application, or you wait until several thousand people download your application, install it, don’t tell it like garbage, and then get good provision from the suppliers.

Answer 2

Even if your application is signed with a certificate issued by one of the CA participating in the Microsoft Trusted Root Certificate Authority program, there may still be some problems if you do not use the EV Authenticode code signing certificate and / or continue to renew its certificate for an unlimited period. See "IE9 SmartScreen Warning Despite the Following Recommendations . " In short, you pay for the reputation of a software publisher.