It is extremely likely that the emergence of a new virus or Trojan will infect hundreds or dozens of computers, and possibly thousands. This is especially true of network worms. As a result, it is important that antivirus software vendors be able to release protection updates quickly and efficiently to prevent these computer worms from spreading.
Unfortunately, a number of AV programs are plagued by a number of serious issues that limit their effectiveness. If you are using any of these software it is important to be aware of these issues so that you can take the necessary steps to protect yourself.
First the fact that many anti-virus programs can’t detect all Trojans and viruses. This is a direct consequence of the fact that virus writers and hackers create new kinds of malware. As a result, far from all anti-virus software sold on the Web will provide a protection of even a fraction of 100 100%.
A common software issue could also produce symptoms that appear virus-related. It is essential to examine other causes of issues before you believe that a computer has been affected by virus. For instance, certain kinds of malware may cause pop-up windows to appear on the screen which displays pornographic pictures or news articles. A related symptom is when the screen constantly displays ads for websites you do not visit.