Hello! Sorry I don’t have a windows machine to try it, but might be something related to being an app not coming from the appstore maybe?
Viewing post in Can't install Demo - Virus detected
I doubt it. I can install other applications without appstore and also run portable versions without issues.
I suggest you to submit your app for malware analysis as a software developer: https://www.microsoft.com/en-us/wdsi/filesubmission