Hi
I downloaded the 30 day trial version of cityEngine. My virus protection said it was a high risk virus or one is attached to it. It may just be my protection stuffing. Does this virus thing happen with the pro
There is nothing wrong with CityEngine itself. It’s either your antivirus software misdetecting virus, or you actually downloaded CityEngine not from legitimate place and it actually has a virus 
if you downloaded the demo from the City Engine website, then it should be ok.
What AntiVirus do you use?