Potentially unwanted programs, also known as PUPs, continue to be a real nuisance. A recent blog post by Will Dormann on CERT.org shows the prevalence of such applications lurking on every corner of the web: search engines results, software portals, popups, ads, etc.
more here...........http://blog.malwarebytes.org/malvertising-2/2014/07/a-cunning-way-to-deliver-malware/
more here...........http://blog.malwarebytes.org/malvertising-2/2014/07/a-cunning-way-to-deliver-malware/