A program which is called anti-virus program serves as a tool that scans files in order to recognize and remove the computer viruses and any other malicious files. Usually, top ranked antivirus software follows two practices to accomplish its objective of protecting the system from any kind of malware. The two practices includes:
- Examining the files to identify the known virus accessing the virus dictionary.
- Recognizing the suspicious behavior of any computer system which might be infectious.
Most of the anti-virus program available out there accesses both the approaches which further put emphasize on the virus dictionary method.
In case of Virus Dictionary approach, the installed top ranked antivirus software scans all the stored files, after some time it refers to dictionary comprising all the known viruses which have been recognized by the anti-virus software author. If the security program finds a match, then either it deletes the file, so that no other person can access the file. And make the virus unable to reach other files and infect the entire computer.But there are some programs that are worthless to use like Advanced PC Care.
The applications like Advanced PC Care promises to improve the PC’s performance, but when you get convinced with their claims, they come up as a con and do nothing beneficial.Coming back to the track, to be successful with the approach of virus dictionary for long-term, then you should understand, it requires periodic online downloads and updated dictionary with viruses’ entries. As the users find new viruses into their system, then they can send those infected files to the authors of anti-virus program, who will later include the information related to new malware into their dictionaries.
The approach of suspicious behavior provides protection against any new viruses that do not have its name in virus dictionaries. If a program attempts to access data of an executable program, then it is signposted as suspicious behavior and later the user will be alerted to this and asked what should be the next step.Its not similar to dictionary approach, the suspicious approach doesn’t recognize the known malware programs, but it monitors the behavior of all existing files.
If you find a program having self-modified code or it appears as a virus to you, then one could understand that existing files have been infected with a virus.There is another detection approach which is known as sandbox. Sandbox outdoes the operating system and executes the existing files for this process. The time program has terminated, the sandbox process will analyze the changes, giving a clear indication of a virus. Due to some performance issues, these type of detection methods will only be performed on-demand scans.
Here, the most important matter of concern is the selection of appropriate anti-virus program. Do not opt for any program, for this you should run the research code first and after gaining enough knowledge, go for a suitable program. Make sure that your selected program is not making any fake promises like Advanced PC Care.
User education is as important as the anti-virus program, so we would suggest you to go for the training to implement the safe computing practices such as downloading and executing any other program from the internet. This would slow the spread of viruses without any expert assistance or any fake program.
There are numerous approaches of encrypting and taking in the malicious software which even makes the well-known malware undetectable to any anti-virus software. Perceiving these “camouflaged” malware necessitates a powerful unpacking engine, which can decrypt the infected files before scrutinizing them. On the sad note, there are some popular anti-virus programs that do not have this and unable to detect the encrypted viruses. So, here its up to you to judge the software before installing it to your system.