An antivirus program protects your PC alone is often not sufficient against the latest virus tricks. Many computers are already infected. Only with the correct second-scanner tells you whether your PC is actually virus free.
A computer that is no protection on the Internet is an easy target for malicious programs. This is especially true for most popular Windows operating system, which is attacked daily with hundreds of new viruses and worms.
Your PC may be infected with viruses, even though you have installed an antivirus program. For more informachion please check antivirus watch website. Because some viruses are so new that they are not recognized by the protection program. The pests then manipulate the security software so that they will still function, but no longer protects. The result is that the user will feel safe, while the virus turns the PC into a spam machine.
Against such attacks is to protect anti-virus software. But the price differences are large - there are free versions and programs for which the price up to $100. The Foundation has taken 13 security packages and three free virus scanner under the microscope. The testers were focused on the antivirus and firewall.
Getting a second opinion on virus-free system is not easy because the installation of a second anti-virus program does not work in most cases. For two antivirus programs installed on the computer would come in the way of each other, blocking each attack like cannibals or the other. This happens for example if the file is not encrypted with the virus signature is strong enough. In this file there are distinct parts of the code of viruses in order to discover they can. A foreign scanner but do not recognize this file as an information pool for a protection program, but as an archive of thousands of viruses.
Instead of installing a second antivirus program, you should run the virus check with an online scanner. In addition, you can check your drive with a pure anti-virus scanner.
One of the bes AV programs is AVAST. It is a freeware. Avast Antivirus Pro protects your PC from viruses and spyware. The program checks for example, whether incoming or outgoing e-mails infected by viruses. Even while writing an instant message, it protects your system against attacks from the network. The integrated Virenwchter controlled in real time, whether infected files on your PC and are schlgt alarm when it was discovered. Avast Antivirus Pro also checks for whether your downloads have been infected. The integrated scripting protection detects badware scripts that are hidden in Web pages. For fans of PC games in derogation of the program while playing in full screen mode, the display of pop-ups and other screen notifications. In addition, the software takes you through an automatic boot scan. This place virus and rootkits that are detected only partially, if the OS is not running. The heuristic module proactively detects malware and virus definitions with normal signatures could not be found.
For virus scanning, the scanner makes sense to use any other antivirus vendor. To increase the chance that the second scanner is a pest that has been overlooked by the first scanner. However, not all products are installed, the scan engine, which is also on the package. In the software Steganos Internet Security, for example, the hidden engine of Bitdefender and in the program ZoneAlarm Internet Security is installed, the scanner from Kaspersky. Which program is in which scanner you see in the table below. Here we have listed to online scanners and scanner which should be second best to use. The selection of the alternative scanner based on the results of recent tests at AV-Test Safety Institute.