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Traditional antivirus programs work by scanning the files and systems on a single computer for known patterns of malware. These programs maintain a database of known malware threats, and they use this database to identify potential infections on the computer.

When an antivirus program is run, it will first scan the computer’s files to see if any of them match the patterns in its database. If a potential infection is detected, the program will then attempt to isolate and remove the malware. This may involve quarantining the infected file, deleting it, or repairing it to remove the malware.

In addition to scanning for known malware threats, many antivirus programs also include other security features, such as the ability to block suspicious network traffic and to monitor the computer for signs of unusual activity. This can help to prevent malware infections and to identify security threats as they emerge.

Overall, traditional antivirus programs work by continuously scanning the files and systems on a single computer for known patterns of malware, and taking action to remove any infections that are detected.