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  1. Anti-virus software, especially free programs, can be limited because they can protect computers for certain virus variants only but will not protect computers for the more sophisticated ones.
  2. Anti-virus software depends on the signature files that contain the latest virus information, and the new viruses are not included in the signature files which limits the capability of anti-virus software to catch new viruses.
  3. Most anti-virus software cannot detect and clean zero-day exploits which means the viruses that spread and infect many computers in zero number of days, even before security experts can identify them as malicious.

These are a few limitations of an Antivirus Software.

Sources: techheadzny.com, ehow.com

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Q: What are the limitations of antivirus software?
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