Antivirus is a common product that has long been advertised as a common item similar to a toothbrush, detergent or car. Although it is a regular product antiviruses aren’t free of flaws and issues.

It’s not feasible for antivirus programs to keep up with the variety and quantity of new malware being developed every day. It is an arms race, and it is far from all antivirus software available off the shelf or on the internet actually offer a security level close to 100 100%.

Another problem is that Trojans and viruses can manipulate your computer’s software in a way that it cannot detect them. This is possible when the virus changes the settings of the antivirus program or when it uses one of its features or functions to cause best buy false-positive.

There are many instances where the antivirus program is unable to recognize files, even if they are infected with malware. This happens because the anti-virus hasn’t had a chance to add the specific file to its database. To achieve this, it has to look over the file and compare its content with malicious files already present in the database of the antivirus. This is a long and resource-intensive process. The slower it runs it is, the less accurate the detection. Besides, the antivirus must install interceptors of system events deep within the computer kernel to analyze the data before passing it to its engine for analysis.