Some users may not be versed in AV renewal process which requires users to pay for and activate annual licensing renewals promptly and accurately in trial version products.  There is danger in not keeping up after in the changing landscape of malware attacks.

QUOTE:    Do you have antivirus protection? “Of course I do,” you may say, “It came with the computer!” Don’t be so sure. Most pre-loaded antivirus products require renewal in three or six months. If you don’t renew, the product expires, and your protection takes a nose-dive. A recent blog post from Microsoft’s Tim Rains reveals that systems “protected” by an expired or out-of-date antivirus are almost as prone to infection as systems with no antivirus at all.

Looking specifically at consumer-owned computers, rather than those belonging to enterprise domains, Microsoft researchers determined that the MSRT removed malware from 0.6 percent of computers that have an active, correctly-configured antivirus installed. (Yes, they could dig deeper and identify which antivirus products missed malware, but that information isn’t something they release publicly).

The percentage of infected PCs with no antivirus at all was considerably greater—2.4 percent. Looking at PCs with antivirus protection present but disabled, they found 2.2 percent infected. That was also the percentage of infected PCs with expired antivirus. When the antivirus wasn’t expired but antivirus definitions were out of date, the infection rate was 1.9 percent.

In his blog post, Rains observed that “there was only a .2 percent different in the number of systems Microsoft cleaned of malware when comparing those that were not running security software to those that had expired security software.” In other words, an expired product is almost worthless. “In light of this information,” continued Rains, “we encourage people to verify that they are running up-to-date security software on their system. If they aren’t, there are many different free or paid options available.”