Microsoft kicked off auto-upgrade last January. Both IE8 and IE9 profited from the move, as they are the newest versions able to run on Windows XP (IE8) and Vista and Windows 7 (IE9); the policy also accelerated the decline of IE7.
Since Windows 7 accounted for nearly 45% of all personal computer OSes last month -- a number sure to be even higher when IE10 officially launches -- the auto-upgrade will quickly move a massive number of users to a browser with DNT switched on.
IE10 for Windows 7 -- a 22MB to 43MB download for the U.S. edition -- can be retrieved from Microsoft's IE-specific site.
Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at @gkeizer, on Google+ or subscribe to Gregg's RSS feed. His email address is email@example.com.
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