CWmike writes "Microsoft's Windows ran to stay in place last month as Window 7's market share gains made up for the largest-ever declines in Windows XP and Vista, data released today by Web metrics firm Net Applications showed. By these numbers, Windows 7's gains were primarily at the expense of Windows XP. For each copy of Vista replaced by Windows 7 during November, more than six copies of XP were swapped out. Meanwhile, Apple's Mac OS X lost share during November... betcha Ballmer is having an extra giddy time with that news. Linux came up a winner last month, returning to the 1% share mark for the first time since July. Linux's all-time high in Net Applications' rankings was May 2009, when it nearly reached 1.2%."