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Standalone application that identifies and removes viruses and worms in the system. Designed as an addition to standard anti-virus programs, it can be run without having to be installed - useful for systems that are already infected.

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Finds and destroys software trojans, reports changes in the registry and ‘immunises’ the computer to prevent future spyware installations. Also available as a version for mobile devices. Fast and secure download from The H

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Extended version of the free virus scanner Avira Free Antivirus. Protects against viruses, rootkits, spyware, phishing and malicious web sites. Also detects unknown viruses by behaviour. Prevents downloading of viruses while browsing the internet and monitors mail traffic.

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Protects a computer from malware. Has an anti-virus and anti-spyware module, offers real-time and anti-rootkit protection, as well as intelligent virus updates. Silent mode available for gamers.

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Linux-based Enterprise-Firewall/Unified Threat Management solution for protecting your network against harmful attacks from the internet; it uses Stateful Inspection, URL and email filtering to provide protection from attacks, such as hacks, trojans and email and web-viruses. It manages various VPN and SSL connections and enable policy routing. Download requires registration.

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Anti-rootkit tool that searches for hidden files, registry entries, processes and drivers. Discovered files and registry keys may be deleted afterwards.

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Scans the computer for viruses and other malware. Provides hourly database updates and heuristic analysis. Does not verify working memory, MBR or boot sector under Linux. During testing under Vista it ran with Firefox, Opera and Internet Explorer 7 and under Ubuntu with Firefox; currently in development and therefore unavailable.

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Rootkit detector for detecting hidden processes and services, and deleting them as required. Also monitors TCP/IP connections and registry entries. Processes are deleted at the user's own risk and should be performed with caution.

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Real-time protection tool for Android smartphones. The anti-virus protection shields the mobile device against attacks from viruses or mobile spyware, the firewall prevents hackers from being able to infiltrate the device and the data encryption software protects data from unauthorised access. An SMS spam filter is also included. The technology is based on that of the well-known Norton products.

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Anti-virus toolkit. Also scans memory and registry.

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Virus scanner providing a resident shield, personal email scanner and on-demand tests, with automatic updates to the virus database and program files. Versions with more functions, such as protection against root kits, are available for a fee.

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Real-time protection against viruses, worms, trojans, spyware, adware, and other internet threats; the integrated anti-phishing module protects users from personal data theft by fake web sites, while the Social Media Scanner protectS Facebook accounts from malicious content.

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Anti-virus protection designed especially for emails on Unix-based mail gateways. Offers a flexible and scalable multi-threaded daemon, command-line scanner and automatic updater. Also available as a version for Windows.

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Linux-based boot CD that provides a clean environment and virus scanner to check if your computer is infected.

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Run from your computer’s command line, this check for traces of known rootkits.

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Checks files on your computer for viruses, but doesn’t check the RAM, boot sectors or Master Boot Record (MBR). Requires Internet Explorer 6.0 or higher and ActiveX. Currently being revised and so not available.

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Add-on for Firefox that installs a toolbar and uses Virustotal to examine websites and files for harmful software.

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Bootable image with a toolkit that helps administrators remove viruses and trojans from their system. Supports the FAT32 and NTFS file systems. Can be installed from CD or USB stick.

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Bootable software in CD and USB formats for disinfecting computers attacked by malware. Supports x86 and x64 compatible computers, as well as the file systems FAT32, NTFS, Ext2, Ext3, Ext4 and Reiser.

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Protects your computer against viruses and other types of malware. Includes a virus scanner and a firewall, and provides proactive protection. Fast and secure download from The H

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