Frankfurt (rmn) All the information that a computer after a restart recall should have on a disk - usually in ordinary files. This is not a virus while off the computer dies, it must also be in a file. This is where the virus scanner. You read all the files on a disk and compare them with the known viruses.
A sterile environment
If a virus scanner certainly a clean file, the environment for a virus. These scans at the start he first memory of the computer, whether there is already a new virus to victims waiting. If this is the case, the virus scanner no foreign file to the virus is not the way to pave. Instead, he calls on the computer to restart. This is the virus from memory removed and the virus scanner can be used in a clean environment follow his work.
The health check
A major “health check”, the virus scanner only at the request of the user or after establishment of a time control. It opens the anti-virus program every file on the hard drive and compares its contents with the properties of all known viruses him. This process takes some time to complete, but according secure.
For most anti-virus programs, the user can set, which will be thoroughly searched. This allows searches to certain file types or directories restricted. For the “Scan-between” recommended such a quick search. Try, but at least once a month a truly comprehensive search.
Permanent checks
Many anti-virus programs offer a constantly active protection. It turns on the virus scanner between the application and the operating system. Each file, which is then opened to be first in the virus scanner, it only frees when no viruses found.
Such protection is highly recommended, but on older computers influence the speed. If you want to waive this protection, you should instead, each newly inserted disk, and each received from the Internet file before their first use of a manual test. Additional protection creates an automatic virus scan immediately after turning on the computer.
Good tool Bracht care
An anti-virus program can only those viruses, which are also known. But since new pests appearing daily, an old virus scanner soon be useless. Too many viruses would he go through the net, and the program would give users a false security lull - until it is too late.
The manufacturers of anti-virus programs have to this development have long responded. Modern Virenschützer bring a feature to the latest virus definitions from the Internet to download. This additional information can be found in the files that all known viruses and their properties listed. As soon as new viruses appear, the Virenschützer respond. Almost every day there is a new virus definitions for the different anti-virus programs.
The more you load this information, the better is their computer. Mostly, it is sufficient, this online update every 7 to 14 days once.
The operation
If a virus scanner a virus found in a file, is the choice of surgical method. Here, the user is often asked. Alternatively, in the settings he wishes his deposit.
Three approaches are familiar:
Has the virus only to an existing file, an operation possible. The anti-virus program can be dangerous code from the file and edit out the original file to save. Then they can be reused safely.
Did the virus on the other hand, the original file is changed or the content even completely replaced. Is it your data at this point no escape. You can only try to extend to prevent the infection.
One possibility is to rename the file or move to a protected folder. This way you should choose if you already experience in dealing with viruses have collected or the advice of an expert search for. The file is then with another expansion in a part of the hard disk to which the virus scanner prohibits access. The program can no longer be unnoticed. You can download the file stored until further information has been or may have an improved anti-virus program is published, but you can still help. Make sure, but not too great hopes.
If this is too costly quarantine, or they fear the virus accidentally but later re-activated should be up for the hardest method: Delete the file. Transferring this task in the anti-virus program. It will ensure that the file is not in the trash lands, and increasingly there.
Wrong helpers
Once a virus is found and removed, you should contact your computer off, and after a minute again. Repeat after the virus testing. The interplay of certain versions of Windows and virus scanners will find that a deleted file is present. In this case, you restore the system of Windows staked a bear.
This really useful tools for Windows tries accidentally deleted files restore to the system to keep running. Unfortunately, it proposes that an infected file is restored. If they are in your Windows manual to find out how to restore the system off and then start the search again viruses.
E-mail control
High quality anti-virus programs offer an additional function: to make e-mails before they are stored on your computer. While the above processes only within existing files, this feature uses a different way. The anti-virus program is stuck between the E-mail client (eg Outlook) and your Internet connection.
When you retrieve new messages, their client no longer directly to the E-mail with your provider (eg T-Online). It is the task of the anti-virus program and e-mails as attachments only accept this. Thus, a dangerous Annex been found before it is stored on your computer. However, these functions are not for all e-mail clients. Remember before the purchase of software announcements made by the manufacturer.
An ill Doctor
The anti-virus program itself is the ideal target for a virus. Because you are a regular user this program to access all your data allow an infected could anti-virus program in Nu their entire data unreadable.
Meanwhile, anti-virus programs, therefore, when you start a self-test. It examines the programme initially his own files. But here, too, that only viruses can be detected, older than the virus definitions of the scanner. Do you also for this reason your virus scanner up to the latest standard
In addition to the anti-virus programs are only for manufacturers even download or in the original packaging buy. It is not excluded that alleged virus scanners on the Internet, not try to protect their system, but want to harm him.
The emergency operation
It may happen that your anti-virus program after each launch of a computer virus in memory and therefore finds his ministry denied. It will ask for a restart, the circle closes. In this case you have to make provision.
This vicious circle arises when the virus on the disk directly to the operating system has copied. He is already active as before the anti-virus program can be started. In order to break the vicious circle around that you need to start the computer, without using the hard disk.
Create best immediately after the installation of the operating system an emergency floppy disk. With this, you can start the computer, without having to access the infected hard drive. Imagine previously in the BIOS sure that the startup disk in the first place in the boot sequence. Information, see the description of your computer.
In addition, you need an anti-virus program that will run from floppy. These programs can be found partly on the home pages of manufacturers, but also tend to create the installed anti-virus programs such an emergency floppy disk. An appropriate command will be in the settings, options and tools of the anti-virus program.
If your computer with this emergency disk launch, the launch of Windows prevented. Instead, it reports a text-virus scanner, which is now hard to clean up their attempts. If this is finished, restart the computer. For your safety, you should then also under Windows nor a virus scan.
If you use the anti-virus software on CD-ROM purchase, you can usually even this CD in place of the ERD. Set the BIOS to boot from a CD-ROM, insert the first CD in the CD drive and restart the computer. Some of these CDs virus search in such an emergency the Linux operating system, which hardly susceptible to viruses. This is the therefore not unusual ads when you start the computer.
Source: http://www.rhein-main.net/sixcms/detail.php/1584886