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NavaShield is a rogue antivirus program that tricks users into downloading it. Initially discovered in 2010, it advertised itself with the slogan "award winning computer protection".〔 〕 In 2013, it was discovered that its servers were down, and any registration key entered in its download window was useless. == Behavior == It had its own website, Navashield.com. The site appeared like any antivirus website, so normal Windows users may have thought it was legitimate. This is aided by its design. The rogue doesn't do anything until one week has passed, when it begins nagging the user to buy the "full" version. It does this by making a ticking sound and displaying an ad encouraging consumers to buy NavaShield. After the rogue has been on the system for several weeks, it attempts to simulate a malware infection to get the user to purchase the fake program. To do this, it plays the sound of a group of men laughing over and over again. If the player has one of Microsoft's Text-To-Speech voices installed (usually Microsoft Sam), Navashield will make the TTS Voice swear at the user or say nonsensical things, such as "I am a Robot from outer space." The icon tray starts changing in size, and random websites are opened in the user's web browser. Finally, another laugh that is higher in pitch starts to play. Another variant of Navashield fakes a malware infection by displaying an inescapable message box that says "Disk drive C:\ is being deleted" and slowly grows while making a beeping sound. Eventually it takes up the entire screen, and afterwards it flashes to your desktop wallpaper, but with no icons, taskbar, start menu etc. Some minutes after the rebooting process, the screen goes back to its normal appearance. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Navashield」の詳細全文を読む スポンサード リンク
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