Antivirus is a common product that has long been advertised as a common product, similar to a toothbrush, detergent or car. However, despite being such a regular product antiviruses are not without flaws or problems.
It is simply not possible for antivirus programs to keep pace with the variety and quantity of new malware being developed every day. It’s an arms race, and is far from all antivirus programs available off the shelf or online actually offer an overall security level that is close to 100 100%.
Another problem is that Trojans and viruses can alter the computer’s software to ensure they are unable to be detected. This can happen when a virus changes the settings of the antivirus program, or when it uses one of its features or functions to generate false-positive.
Additionally, there are numerous instances where the antivirus program cannot detect files even if they are clearly dangerous. The antivirus software hasn’t yet had the chance of adding the file to its database. In order to do that, it needs to analyze the file and compare its contents to known malware-related files in the antivirus’s database. This is a lengthy and resource-intensive process. The slower the process, the less accurate the detection. In addition, the antivirus has to install interceptors of system events deep within the protected computer kernel to analyse the data and then send it to its engine to be analyzed.