A few million users have installed the newest version of Firefox. By default, there's an interplay between Google and Firefox that can cause the first site returned in search results to be downloaded to the computer automatically (including any associated cookies). One new feature in Firefox is a scary warning message when you access its configuration menu. That message reads:
Anti-virus is the name given to software that detects and (where possible) removes viruses from messages. By removing viruses at the email server, all internal mail clients are protected AND all customers are protected from receiving viruses too.
Computer Viruses are written by people who wish to gain control of your system resources and are continually updated to try and break through any barriers you may have installed.
Each package has its own method of response when it locates a virus, and the response may differ according to whether the software locates the virus during an automatic or a manual scan. Sometimes the software will produce a dialog box alerting you that it has found a virus and asking whether you want it to "clean" the file (to remove the virus). In other cases, the software may attempt to remove the virus without asking you first. When you select an anti-virus package, familiarize yourself with its features so you know what to expect.