Trojan viruses definitely make web surfing and regular PC activities tiresome, time-consuming and unsafe. Every case of a trojan infection is potentially risky to one's privacy, because trojan viruses are so nasty and known for the damage they cause to computers and data.
Cyber criminals spend a lot of time on perfecting the code of trojans. Every virus they release in to the World Wide Web is a money-maker, and so they struggle hard to make sure their viruses will bypass as many types of antivirus protection as possible. This war between makers of security software and virus coders is never going to stop.
That's why despite antivirus programs with latest updates, firewalls and program access control it is still easy to get attacked by a Trojan virus and discover the infections when it already is too late.
Some PC owners prefer to reformat their computers and reinstall all the software every time they face a virus infection. But this approach is blind-sig hted. Just imagine that installing all the software from cd's and dvd's can take up a whole day! That's a waste of time.
Therefore I suggest that you keep somewhere (say, on a spare USB flash drive) a set of freeware tools that will help to get rid of most trojan horse viruses that are circulating around.
SDFix developed by Andy Manchesta is one of the first tools you will be recommended for download at popular computer tech forums. SDFix has become indispensable software for PC enthusiasts and regular users who want to master the skills of fighting malware. Despite simple command-line interface which may look odd for inexperienced Windows users, this application does some things that many costly commercial programs aren't capable of. Ability to remove malicious files with HIDDEN attributes is on of the virtues SDFix possesses (such hidden files are commonly left by the Conficker Trojan virus, also known as Downadup). Without removal of hidden entries no infection is completely taken over and can easily self-restore at next boot up. a-squared command-line anti-malware is one of the very few programs developed and maintained by a software company. Being a free application, it still gets daily updates but requires no keys or subscriptions of any kind. Just like SDFix described above, a-squared command-line tool will run in Windows Safe Mode (usually it is recommended to begin the Trojan virus removal procedure in the Safe Mode). All it takes to initiate a scan with a-squared anti-malware is to download the ZIP archive from manufacturer's website, unpack and execute the software. A-squared supports a number of command line switches to help configure the scan process. This software can instantly remove detected Trojan horse viruses as well as worms, dialers and other malicious objects. For users who feel more comfortable with traditional Graphics User Interface, DrWeb offers CureIt!, a freeware scanner with GUI. Things I don't like about CureIt are its download size and non-configurable start-up scan. But these are minor nuances which don't affect the scan speed and efficiency. Unlike a-squared command-line, DrWeb CureIt still requires some kind of installation before it can perform the scan.
These are 3 freeware tools that are small enough to be kept on a CD or external drive just in case you ever need to get rid of the Trojan horse virus.
Learn and download the tools that will always help you in case you need to remove trojan horse viruses or other types of malware. A simple do-it-yourself guide will tell you what steps to follow in order to clean out the infections.
Alberta Glamerheim writes PC maintenance guides and published articles about Windows security issues.
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