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Out of date antivirus is worse than no antivirus at all

Sometimes we get asked the question, “How could I have got a virus when I have antivirus protection installed?”  Most people have taken the precaution of installing antivirus software, or perhaps had it preinstalled when they purchased their computer.  A common problem, however, is that they may not have kept the product up-to-date, or perhaps their operating system & browser have not had the latest “patches” installed.  Also, new viruses are appearing all the time, & may infect some computers before a “fix” is written for them.  To be effective, antivirus software should be updated regularly.  Personally, we like to set our antivirus to automatically check for updates as frequently as possible, which are 3 hourly in our case.

One particular danger with out-of-date antivirus is that it lulls you into a false sense of security.  Your antivirus vendor is constantly posting updates as new threats become known.  Download and install the latest update when it becomes available, then regularly do a full scan of your system.