Regarding the same program as [my question a few minutes ago](https://stackoverflow.com/questions/20061/store-data-from-a-c-application)... I added a setup project and built an MSI for the program (just to see if I could figure it out) and it works great except for one thing. When I tried to install it on my parent's laptop, their antivirus (the free Avast Home Edition) set off an alarm and accused my setup.exe of being a Trojan.

Does anyone have any idea why this would be happening and how I can fix it?