You have just to keep trying, and reconnecting . when it block at "Successfuly connected" wait it , it happend to me at first time , it took for me a half day . So , all you have to do is to wait and be patient .
No bro it 's not a virus i use this client and my Game work Good
Well , about that check it by using
VirusTotal befaure opening , downloading any thing .
For me , the web site said its clear , all anti-viruss said its clear ( exemple of it : " Kaspersky Clean site " )