At Computerworld, Gregg Keizer lists the five most essential patches of 2009.

"Fact: Everyone who patches is safer," Keizer writes. "Fact: Not everyone patches."

"So rather than recite 2009's patch history -- dismal as it was, with Microsoft, for instance, setting a record in October for the most updates and most flaws fixed in a single month -- Computerworld thought it would be more useful to more users to simply spell out the year's five most important patches," Keizer adds.

Click here to read the Computerworld story.