I've looked into the problem and it seems that the virus alert is false positive, erroneously triggered for some Unity games. Unfortunately, this is something out of my control, and the only thing I can advise is marking the alerts as false positives when they appear.
As for the process sitting there and doing nothing, I suspect it might be related to the previous problem - the antivirus might be disabling some game files, making it behave in strange ways. It might not though - I was unable to replicate the error on any device currently available to me, so I will be looking into it further.
Sorry that I cannot be more helpful that that. I will try producing some sort of a fix for both of these problems ASAP.