Antivirus software is a form of software that guards PCs from malware infections. This includes viruses, Trojans, spyware, rootkits, adware and worms. It is also able to detect and repair any damage caused by these threats.

Antivirus software is a must for any PC or mobile device. They can help prevent attacks by hackers, as well as detect and remove phishing attacks, ransomware, and spam emails. They can also protect and scan connected appliances such as printers and SmartTVs.

When selecting an antivirus program choose one that has a long history of passing multiple tests and getting favorable reviews from independent laboratories. Virus Bulletin and TechRadar are among the organizations that conduct tests and review antivirus programs. They will let you know the protections they offer in the program, how they perform and whether the program is worth the money.

While traditional antivirus software relies on the signature, or binary pattern, of a virus, which is used to identify it as malicious, most hackers have stayed ahead of this by creating oligomorphic polymorphic, and more recently metamorphic viruses which encrypt a portion of themselves, or alter their appearance so they don’t match the signatures of viruses in antivirus databases. Sandbox analysis is a feature used by the latest antivirus programs to combat these sophisticated malware threats. The program executes the file in an environment virtual to see how it behaves.

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