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Antivirus software can keep your computer free of malware, phishing scams and other malicious files that can steal information or cause slowdowns. The programs will scan your computer for such threats and remove them when they are discovered, and some also offer other security features such as a firewall to help prevent attacks from the network. Certain programs are free while others require a monthly fee to guarantee complete protection.

When choosing an antivirus program be sure to choose a software that uses few system resources so that it does not slow down your computer during scans for viruses or other tasks. Using the program’s search feature to read user reviews can assist you in determining which are efficient and do not take up a lot of memory, disk space or other resources.

The most effective antivirus software will detect viruses with accuracy and speed. They can use a combination of techniques, including specific detection, which looks for known viruses; general detection, which can identify parts or types of malware; and heuristic detection, that analyzes the behavior of the user to find suspicious patterns. Once a virus has been identified the program will then isolate the file or program from other files and programs, block access to it, and then delete it. Some programs will show an alert to indicate that the threat has been identified or removed.

Anyone looking for the best and most secure antivirus software should consider one with additional protections including firewalls, cloud-based scanner, parental controls and ransomware protection. Other features include a no-cost trial or money-back guarantee, compatibility with multiple devices regular updates, and customer support.

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