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Microsoft Defender Antivirus (formerly Windows Defender) is an antivirus software component of Microsoft Windows.It was first released as a downloadable free anti-spyware program for Windows XP and was shipped with Windows Vista and Windows 7.
PUM.bad.proxy is a form of malware known as a "registry hack", an unauthorized alteration to the Windows Registry file that specifically redirects LAN settings within Internet Explorer, the popular web browser commonly installed as the default web browser for Microsoft Windows.
Your computer is infected with spyware!" to lead to an antispyware vendor's page. The start page will return to normal settings once the user buys their software. Programs such as WinFixer are known to hijack the user's start page and redirect it to another website.
Some variants will also redirect the user from the actual Google search page to a false Google search page with a link to the virus' page that states that the user has a virus and should get Antivirus 2009. In some rare cases, with the newest version of the malware, it can prevent the user from performing a system restore.
Koobface is a network worm that attacks Microsoft Windows, Mac OS X, and Linux platforms. [1] [2] [3] This worm originally targeted users of networking websites such as Facebook, Skype, Yahoo Messenger, and email websites such as GMail, Yahoo Mail, and AOL Mail.
Zeus is very difficult to detect even with up-to-date antivirus and other security software as it hides itself using stealth techniques. [5] It is considered that this is the primary reason why the Zeus malware then had become the largest botnet on the Internet: Damballa estimated that the malware infected 3.6 million PCs in the U.S. in 2009. [6]
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