This just in from Microsoft: The company has sold 40 million Windows 8 licenses since the Oct. 26 launch of the new operating system. In addition, the company says Windows 8 is outpacing Windows 7 in terms of upgrades.

Windows executive Tami Reller made the announcement a short time ago, as noted on the official Windows blog. The 40 million number includes licenses sold to consumers and businesses as part of volume licensing deals.

Microsoft also noted that the number of apps in the Windows Store has doubled since launch.

A report on Nov. 16 by longtime Microsoft watcher Paul Thurrott said Windows 8 sales were well below Microsoft’s internal projections, citing an anonymous source.

Update: The company also mentioned that an unspecified number of apps in the Windows Store have surpassed $25,000 in revenue, which means that the developer now keeps 80 percent of the revenue from here on out.

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