The last file is always different, i.e. opr162.tmp or opr.16c.tmp.
So long as I am running Opera, Antivir will detect the Heur malware about every 5 minutes or so. I've been telling Antivir to move these files into quarantine.
How do I get rid of it? Is there a chance that Antivir is giving me a false positive, or should I go through the process of final removal?