I installed Yosemite and now have numerous obscene advertisements (and I mean 8-10 windows opening on their own) each time I click on a new page. They are also forcing their way onto the websites I view above an of their content. Adware Medic is not picking up on anything. ClamXav finds the following but will not quarantine so I don't know how to get rid of it: Filename Infection Name Status /Users/amandabotfield/Library/Mail/V2/POPemail@example.com@pop.asia.secureserver.net/INBOX.mbox/835617ED-0865-46BB-85C6-C218F83C85B9/Data/1/3/Messages/31815.emlx Heuristics.Phishing.Email.SSL-Spoof /Users/amandabotfield/Library/Mail/V2/POPfirstname.lastname@example.org@pop.asia.secureserver.net/INBOX.mbox/835617ED-0865-46BB-85C6-C218F83C85B9/Data/2/3/Messages/32509.emlx Heuristics.Phishing.Email.SpoofedDomain My computer was fine prior to installing Yosemite and I have never previously had any trouble with any of my Mac's. I cannot log into the Apple Forum, I enter my Apple ID and password and it does not log me in so I cannot ask for help there. Our computer is a business computer for an early childhood service so these ads are highly inappropriate. I am not sure what else to do. PLEASE HELP! And I apologise for the offensiveness of the picture below but that is a mild shot of what we are being exposed to.