The following tools are used for protecting the computer against virus attack except
Answer Details
The tools listed in the options are all related to computer security and protection against malware and viruses, except for "Trojan horse".
A Trojan horse is a type of malware that disguises itself as a legitimate file or program, but when executed, it can damage or steal data from the computer system. It is a form of virus and therefore, it is not a tool used for protecting the computer against virus attacks.
On the other hand, Avast anti-malware, Kaspersky, and Norton are all anti-virus software programs that are designed to protect the computer against various types of malware, including viruses, trojan horses, and other types of malicious software. These software programs provide real-time protection by scanning files and programs for any signs of malware and removing them before they can infect the computer.
In summary, while Avast anti-malware, Kaspersky, and Norton are tools used for protecting the computer against virus attacks, Trojan horse is a type of virus and not a tool for protecting against virus attacks.