When I see the annual updates for their antivirus programs, I'm always quick to ask: why should anyone update? In the case of Norton, Symantec requires an upgrade. Signature-file updates are available for only two years after a product's release. Thus, every three years or so you must upgrade to the latest version -- or switch to another antivirus application. Although McAfee's policy is not as draconian, it also eventually discontinues its updates, although not on a set schedule. I think everyone should periodically upgrade antivirus software to take advantage of the latest and greatest security features, but only if the vendor gives you better features from year to year. Within the antivirus market, Trend Micro is a distant third in terms of market share, but it deserves your attention. It's your £40, so why not get something worthwhile for your money?

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