Appear several times a comment or question about what if we install two antivirus or more in a single computer. Some of us may conclude that the computer will be more secure from viruses, and some others may give opinions that it is not necessary. How should? Whether we need to use two or more antivirus in a computer? Next a little review on it. In fact, if not so required, it’s not recommended to install two antiviruses or more in single computer, except perhaps with a local antivirus that just to clean the virus only (manual scan). Antiviruses vendors self usually also recommend using only one antivirus.