I noticed that Optimizer Pro has been around since at least Feb 2013. Why hasn’t Avast created a definition to stop it. I have it and can’t get the download to work. Does anyone know if this malware can cause that
Thanks
Optimizer Pro is a PUP or Junkware. Go to the UI>Settings>Active protection>Filesystem shield/Web Shield and Efficiency and turn detection of PUPs on.
Follow this instructions here and an expert will help you to get rid of this: http://forum.avast.com/index.php?topic=53253.0
Needed are Malwarebytes, OTL and aswMBR logs(not win 8 and newer)
Monitoring the situation. For now, I only require the logs from the OTL scan. 
What OS/SP?
What download are you talking about?
What exact version of avast and vps ?
Mercedes has been around since 1885 and…
you get the picture…rouge / Fake security programs may look the same on the outside but changed on the inside to avoid detection. New versions are released evry week
Fake antivirus overwhelming scanners (posted 2009) http://news.techworld.com/security/3203072/fake-antivirus-overwhelming-scanners/
http://en.wikipedia.org/wiki/List_of_rogue_security_software
http://www.spywarewarrior.com/rogue_anti-spyware.htm
Valinorum can help remove it.
However, No anti-virus will give you 100% block results. If you find one, let me know, I’d love to use it!