An anonymous reader writes "According to this article, Microsoft is only a few lines of code away from becoming the greenest company on Earth." From the article: "Redmond should issue a software upgrade to every computer running Microsoft Windows worldwide to adjust each machine's energy-saving settings for maximum efficiency." The author figures that the upgrade would affect 100 million computers and that the power cost savings could hit $7 billion per year. CO2 emissions would be cut by 45 million tons. But what about the impact on computing?