Antivirus software can distinguish between programs and viruses because it can distinguish them by comparing the virus characteristics in programs and virus databases.

In other words, if 1000 virus characteristics are recorded in the virus database, anti-virus software can distinguish these 1000 viruses. With the emergence of new viruses, anti-virus software will increase the knowledge of new viruses in the virus database. Otherwise, this new virus will not be recognized.

After the antivirus software company discovered the new virus, it added a new virus signature to the virus database. This is the ability of antivirus software users to identify new viruses by upgrading the virus database.

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Keep the antivirus software updated to meet the security requirements of the computer. Due to the emergence of new viruses, trojans and other dangerous software, new variants will appear every day, so the virus database will also be updated to protect the integrity of information.

Programs use virus databases to protect computers, and software components use them to search and delete harmful objects on computers. The signature database not only adds new threat records, but also provides methods to deal with viruses. So this needs to be updated regularly.

Updating in time is very important to protect the computer. If you sometimes forget to update, the protection of the program to the computer is probably unreliable.