How to prevent "Microsoft defender SmartScreen prevented an unrecognised app" warning for my own python based app

Question

Hi, 

I developed a python based application for windows and I created a setup exe for installation into Program Files (x86) folder via inno setup tool. My problem is whenever I execute my setup.exe file on another windows device, SmartScreen shows "Microsoft defender SmartScreen prevented an unrecognised app from starting. Running this app might put your PC at risk" warning. 

I found 2 methods to bypass the warning:

(reference: https://stackoverflow.com/questions/48946680/how-to-avoid-the-windows-defender-smartscreen-prevented-an-unrecognized-app-fro)

1- Click "Run anyway" button-> I really do not want to give my users an impression that my application is an unreliable one. So therefore this option is not ok for me and I want to get rid of this warning from the beginning

2-Buying EV or OV signing certificate -> I do not want to spend any money at the beginning of my startup project.

So the only solution which I found and makes sense is "submitting my app for malware for malware analyses":

I tried to do that which following link and steps:

https://www.microsoft.com/en-us/wdsi/filesubmission ->clicking Software developer button -> then under file download button

I saw following note:

"Submit only the specific files you want analyzed. Submitting an installer package or an archive with a large number of files may delay the analysis and cause your submission to be deprioritized"

So it means that it is also not the right way to get rid of this warning message.

Does anyone any other idea?

Thanks a lot in advance.

Answer 1

As a workaround, whenever it detect is as a threat, you may add it to allow list.
However, as it has been said, you may submit sample of the file to Microsoft:
https://www.microsoft.com/en-us/wdsi/filesubmission
And explain about your issue and report as false-positive or incorrect detection.