When I tried to install Z3TA+ 2.1, Norton Antivirus removed it with the comment "Statistical Submission: Suspicious.Cloud.5", which it described as "Threat type: Heuristic Virus.  Detection of a threat based on malware heuristics."
 
Anyone else see this problem?  It may be that once enough people running Norton Antivirus have installed it, they'll decide it's safe despite whatever it's apparently doing that's considered suspicious.
 

Nope - I downloaded and installed both v 2.0 and 2.1 a couple of days ago and Norton was fine with it. Perhaps check with C/W directly, or try the download again? Good luck!