Antivirus has been marketed for a long period of time as a common product, similar to a toothbrush, detergent or automobile. Although it is an ordinary product antiviruses aren’t without flaws or problems.
It’s not feasible for antivirus programs to keep pace with the variety and quantity of new malware that is constantly being created. It is an arms race, and is far from how to stop avast from blocking websites the majority of antivirus programs available off the shelf or on the internet actually offer an overall security level that is close to 100%.
Another problem is that viruses and Trojans are able to manipulate the software on your computer to make it so that it cannot detect them properly. This can happen because the virus alters the antivirus program’s settings or it’s ability to create a false positive by exploiting one of its own functions or features.
In addition, there are many instances where the antivirus software does not recognize files even if they’re clearly infected with malware. This happens because the anti-virus hasn’t had a chance to add the specific file to its database. To do this, it must analyze the file and analyze its contents with malicious files that are already in the database of the antivirus. This is a resource-intensive and lengthy process. The slower the process is, the less accurate detection. In addition, the antivirus has to install filters for system events inside the protected computer kernel to analyse the data and pass it to its engine for analysis.