Today we deal with the anti-virus programs in the coming days I will be more responsive to individual programs and their functions.
The main task of an anti-virus program is all pests be they viruses, trojans and worms, stay away from your computer, you should come to this but to remove it again. Some anti-virus programs even go so far as to you before the visit dubious sites that were created for any phishing warning.
Each antivirus program uses different strategies to protect the computer, I will hereafter call this and explaining.
real-time scanner
Almost every anti-virus program has a built-in real-time scanner. If an antivirus program has such a real-time scanner, all requests are checked for files, but there are again two different ways. Either the file is scanned at the normal opening, or only when you create or modify the file. Because the files modified less frequently, or be read, the first option is preferable, some virus scanners offer users the possibility to choose between these two variants, as they give the option to disable or enable real-time scanner.
But will not the computer is protected by the mere use of real-time scanner. He proposes to only files that he has the virus signatures. Should now be in the background an infected file that is regularly enriched with new virus signatures, it is not the real-time scanner possible to discover when you open this file. In addition to scan certain files or archives, improve performance, only in part. Accordingly, in addition to the real-time scanning again and again, a manual scanner.
Manual Scanner
Manual scanner incorporated in many anti-virus programs also equal to. However, there are those that consist solely of a manual scanner. If they find what is often referred to a paid program, which will be used to clean up the computer. A manual scan is much more thorough and reviewed and inactive files according to their harmfulness. It is therefore advisable to perform this scan regularly.
These were the two most important and most common types of scans. Besides these, there's online scanner, and several others which, however, for the "normal" not a decisive factor.
But how will such an anti-virus program individual viruses, but leaves the clean files untouched? This is ensured by the so-called virus signatures and heuristics. By the virus scanner virus signatures it is possible to detect known viruses and thus ensure that it set aside. Many virus scanners have an update function of these virus signatures. For daily contaminate new Internet viruses and virus signatures are quickly too old when they took advantage of something else. Accordingly, this update function will always be used. Only then can the virus scanner recognize the latest virus and remains effective as possible.
To detect any unidentified viruses, there are anti-virus programs that use a heuristic. By the heuristics, the program tries to general characteristics of the malicious software to search. One example is a tool that connects to external web servers. Often, certain programs and share with your server name in order to function properly. This is neither bad nor alarming. However, as we have from the other blog entries know, do this also Stealer and Trojans. Accordingly, the ability to connect to a web server programs, one of the characteristics of malware and is therefore classified by some antivirus programs as equally dangerous. The user must then create an individual approval for the program.
These were the basic stuff to a virus, in the next entries, I would imagine some of them and show you how you deal with them.
Stay Alert!
0 comments:
Post a Comment