When a computer virus infects a computer, it must modify your computer files, critical areas such as the registry or parts of the memory in order to spread or damage the computer. An antivirus program protects a computer by monitoring all file changes and memory for specific patterns of viral activity. When these known or suspicious patterns are detected, the antivirus warns the user of the action to be performed before execution. The following is a list of the different forms of virus detection that an antivirus can use to protect your computer.
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Virus checker software, sometimes referred to as anti-malware software, is designed to detect, prevent, and disarm or remove malware from your computer such as viruses, worms, and Trojans. It can also prevent or remove unwanted spyware and adware as well as other types of malicious programs.
Antivirus and antispyware software is used to prevent, detect, and remove viruses and other unwanted programs (malware) from your computer. To ensure the highest level of security, we recommend using an anti-spyware program with your anti-virus program. Virus detection software typically runs in the background by scanning computers, servers, or mobile devices to detect and limit the spread of malware. Many antivirus programs include real-time threat detection and protection against potential vulnerabilities, as well as system scans that monitor device and system files for potential risks.
Virus checker software usually performs these basic functions:
- Analyze specific directories or files for known malware patterns indicating the presence of malware;
- Allow users to schedule scans to run automatically;
- Allow users to launch new scans at any time. and
- Remove detected malware. Some antivirus software does this automatically in the background, while others inform users of infections and ask if they want to clean the files.
How does an Antivirus work as a Virus Checker
Your antivirus software relies on virus definitions to detect malware. That’s why it automatically downloads new updated definition files – once a day or even more often. Definition files contain signatures for viruses and other malware encountered in the wild. When an antivirus program scans a file and finds that it matches a known malicious program, the antivirus program stops the file from running and quarantines it. Depending on the settings of your antivirus program, it may automatically delete the file. or you may be able to let the file run anyway, if you are sure it is a false positive.
In simple terms, the entire process of analysis and detection is based on the repository (virus dictionary / signature) of known viruses. A robust virus scanner is more capable of tracking viruses, worms, Trojans, spyware and malware often broadcast by cyber criminals for their personal gain. When an intruder is identified to exist in system files, the virus scanner secures the computer by blocking all virus activity.
The virus detection software runs in the background on your computer and checks all the files you open. Depending on your antivirus program, it typically involves on-access scanning, background, research, real-time protection, or other. When you double-click on an EXE file, the program may appear to be running immediately, but it is not. Your antivirus software first checks the program, comparing it to viruses, worms, and other types of known malware. Your antivirus software also performs a “heuristic” check, looking in programs for the type of bad behavior that may indicate a new unknown virus.
When a virus detection program successfully detects a virus or malware, it removes it, moves it to Quarantine, or disinfects it. The antivirus program disinfects the affected files and restores its original form. Subsequently, the files are moved to their original location. When it is not possible to delete the infection, the file is quarantined. This prevents further damage and infected files can still be tried to return to normal. Quarantining an infected file is intended to eliminate the risks to your computer.
What a Virus Checker Does
The virus detection software starts by checking the programs on your computer and comparing them to known types of malware. It will also scan your computer for behaviors that may indicate the presence of new unknown malware. Typically, antivirus software uses the three detection processes of the scan:
- Specific Detection– This works by looking for known malware by a specific set of characteristics.
- Generic Detection– This process looks for malware that are variants of known “families,” or malware related by a common codebase.
- Heuristic Detection– This process searches for previously unknown viruses by searching for known suspicious structures or files. Although detection tools are very effective, no antivirus software is reliable. If you think that your device has been infected, you must take steps to remedy the problem quickly.
RAM Antivirus is one of the most popular on-demand virus checker. You can perform a threat scan to detect infections in locations hidden by malware, such as memory, registry, and file system. A custom scan can also be started. It scans all hard drives and folders with the ability to include memory objects, boot items, registry, archives, and rootkits.