After instalation my antivirus 'named sophos' detect a virus (Mal/Behav-016) on libra3.exe file.
http://www.sophos.com/en-us//threat-center/threat-analyses/viruses-and-spyware/Mal~Behav-016.aspx
Print Sc: http://imageshack.us/g/233/71208016.png/

false positive

I always get this with anticheat programs, it's definately safe don't worry :)

send it off to the antivirus then :)

Dont worry it will only steal your credit card details and steam account :)
Everything is safe :)