Aggressive prompts about the precarious state of security on the local machine; changed wallpaper and popup messages emerging from the system tray area. Some FakeAV samples prevent the user from connecting to websites belonging to antivirus vendors.
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Fake AV trojans (known as rogue AV) are applications that claim the user's computer is infected and professional intervention is needed. In order to clean the alleged infections, the user has to purchase the software and, until payment is made, all the regular activities are disrupted. When installed, the program displays an icon in the notification area from where it displays popup messages from time to time. The application's files are usually located in the Program Files directory, and Registry entries are created in the HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Run to boot at startup