Anti-vitus is the software resident in the computer system. Like a customs officer with a database of known malware file characteristics, he checks the files entering the system from all entries, detects and stops viruses and Trojans.
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Anti-virus is the software resident in a computer system. It acts as the system's customs officer, quarantining the files entering the system from all entries, checking for malicious software such as viruses and Trojan horses, and blocking them. The entries of computers include internet downloads, other storage media, or from the memory of another software. In addition to portal checking, antivirus software can also force checking of all files in the computer system at the user's request.
A virus is a piece of software that attaches itself to other programs, runs along with them, and continues to infect other program files. A trojan horse is a program that pretends to be harmless, or even poses as a well-known software, and entices users to run it in order to install a harmful program or seize control of the system. Anti-virus software maintains an up-to-date database of the characteristics of these known malware, so it can recognize the bad things. Users should always update this database to the latest version in order to maintain the effectiveness of the anti-virus software.
Even so, keeping the anti-virus enabled does not guarantee the computer's safety. There are some well-disguised Trojan horse programs that anti-virus software can't stop if the user is tricked into executing them. Or in the unlikely event that you run into the newest malware that's not in the database, the anti-virus software won't be able to detect them, and your computer will still be infringed upon.
