If you get a message saying the setup has a threat ws.reputation.1 then please read this article.
http://www.ghacks.net/2012/06/25/how-to-bypass-symantecs-ws-reputation-1-system/#comment-1454436
It's not saying it's a virus just that the program is untrusted as not enough people have run it. I always virus check the releases using 2 anti virus apps, however the final say always rests with you the user.