Microsoft’s Windows 7 has sold more than 240 million copies in its first year, making it the fastest-selling operating system.

The new software, which costs from $80 for a simple upgrade to $320 for the top-of-the-range edition, was launched a year ago this week to supersede the unpopular Vista.
Although Apple’s OS X and Linux-based operating systems have won some market share in the past few years, Microsoft still controls 90% of the world’s 1.4 billion or so personal computers, and is expecting more customers to upgrade or switch to Windows 7.
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About 89% of companies – Microsoft’s most lucrative customers – are planning to use Windows 7, said Tami Reller, chief financial officer of Microsoft’s Windows unit.
Microsoft reported record sales of $62.5 billion last fiscal year, up 7% from the year before, largely powered by Windows. The Windows unit is still Microsoft’s core, providing more than one-fourth of overall sales and just over half of its profit.
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