It seems that hardly a week goes by when computer viruses aren't making headline news. The release of the SQL Slammer and Sobig worms last January, followed by the MSBlast.exe worm in August, graphically illustrate how the nature of these attacks is ever increasing.

They also show that, although viruses have been around for over 20 years, computer users generally are still unable to ensure that they have enough immunity to resist infection.

In fact, in many cases the computer world had weeks and sometimes months of advance warning about vulnerabilities, yet the latest attacks have caused havoc for companies and consumers worldwide.

By Dinah Greek at vnunet.

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