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Microsoft last week said that it had sold 200 million licenses of Windows 8 since the operating system launched more than 15 months ago. But how many copies are actually being used?



From Computerworld:
An analysis of available data showed that while not all 200 million licenses are powering systems that did the most basic of PC tasks -- access the Internet -- the number of Windows 8 devices in operation was much closer to Microsoft's claimed mark than nine months ago.

Last May, after analyst Patrick Moorhead of Moor Insights & Strategy questioned Microsoft's then-number of 100 million licenses sold, Computerworld calculated that Windows 8 was actually being used by just 59 million devices.
  Microsoft claims 200M Windows 8 licenses sold, but how many are in use?