antivirus program

(redirected from AV program)

antivirus program

[‚an·tē′vī·rəs ‚prō·grəm] antivirus software

antivirus program

antivirus program

Software that searches for viruses. Also known as a "virus scanner." As new viruses are discovered by the antivirus vendor, their binary patterns and behaviors are added to a database that is downloaded periodically to the user's antivirus program via the Web. Popular antivirus programs are Norton, McAfee, Sophos, Bitdefender, AVG and Kaspersky. Windows Defender is Microsoft's own antivirus software that comes with Windows, starting with Windows 8.

Antivirus programs are used on all Windows machines, but most Mac users do not install them. However, as more Macs are acquired, the Mac has slowly but surely become a target of attacks, and Mac antivirus programs are being installed at a more rapid rate than in the past. See virus, quarantine, disinfect and scareware.

Multiple Detection Approaches
Early antivirus scanning matched the binary signature (pattern) of executable files against a database of known malware signatures before they were allowed to run. This "scanning" process was vastly speeded up by doing a one-time scan of all the executables in the computer and also when a new one is installed. If the executable is virus free, a checksum (hash) of its binary pattern is computed and stored in a checksum database. The next time the executable is launched by the user, its checksum is recomputed and compared with the virus-free checksum. If they match, the file was not adulterated.

Because malware may generate a unique signature each time it is downloaded to an unsuspecting user, antivirus programs also use behavior detection, which looks for suspicious activities such as copying and deleting files when launched (see behavior detection). See Symantec, McAfee, Sophos, Bitdefender, AVG, checksum, virus, polymorphic virus and Reputation-based Security.


Scan and Create a Checksum (Hash)
This is commonly used to speed up antivirus scanning, because computing and comparing an executable's checksum is considerably faster than analyzing the file each time it is loaded.
References in periodicals archive ?
According to Carolyn Naseer, MA, director of AWS's AV Commons division, the new, streamlined version of the AV program will feature a redesigned dashboard that reduces "cognitive load," or the total amount of mental effort a task requires.
Shortly after the system is first powered-on the AV program will initiate a scan and then remove Superfish from the system.
certification process is such that even an AV program created as part of a
This fake AV program blocked the running of all other applications and deployed constant pop-ups and browser redirects to messages alerting the user of an infection and requesting payment to clean up the system.
Users who downloaded the attachment were met with an executable file that infected their system with Sirefef and Live Security Platinum, a rogue antivirus program This fake AV program blocked the running of all other applications and deployed constant pop-ups and browser redirects to messages alerting the user of an infection and requesting payment to clean up the system.
It can also scan your Android device, and just like any other self-respecting AV program, it automatically updates itself online.
Pocket reference guides are distributed during briefings, demonstrations, and training classes and are also provided upon request by the AV program management office (PMO).
The AV Program Management Office regularly provides workshops at the Army's Worldwide Logistics Training Workshop and plans to continue to do so in the future.
According to Naseer, the AV program is based on a collection of rare, science-based techniques "to promote attention restoration, mental focus, optimal movement, resilience, and more.
com/ doc/1) a fully featured AV program which includes email scanning and automatic, free virus definition updates.
The AV program addresses not only the physical aspect of health and wellness, but also the psychosocial aspect, which includes cognition, emotions, and life direction (purpose and meaning).
After selecting an object, visitors will watch an AV program that looks at the full meaning of the object - starting with the basic facts of its creation and use, but then moving on to make connections between it and the larger theme in law enforcement history.