Messages in the Web browser claiming the computer is infected (see below for image examples).
Although the messages look lile Windows XP windows they are just images and they are shown by the Web browser, not by other application running on the user's computer.
Please let BitDefender delete the infected files.
Andrei DAMIAN-FEKETE, virus researcher
Primary method of installing the malware is tricking the user into thinking he/she needs those program to clean his/her computer.
Another method is using vulnerable programs already installed on the user's computer. For example the script tries to use an ActiveX component installed by a rogue antivirus (WinFixer