avast for MAC forum section is here https://forum.avast.com/index.php?board=5.0
Okaz-F = not-a-virus:WebToolbar.OSX.Zako.a (kaspersky) so seems to be some kind of toolbar crap
MacOS:VindInst-A [Trj] = not-a-virus:AdWare.OSX.FkCodec.b (kaspersky) again from the name seems to be Adware
http://community.f-secure.com/t5/Home-Security/Softonic-Download-Site-Briefly/td-p/25152
http://www.thesafemac.com/osxfkcodec-a-in-action/