Microsoft has sold 40 million Windows 8 licenses in a month, outselling the pace set by Windows 7 three years ago.
Sales of the Windows 8 operating system, which was launched on October 26, were driven by upgrades rather than users purchasing the software on new machines, according to Reuters.
Microsoft sold 60 million Windows 7 licenses in two months, compare to 40 million licenses of Windows 8 in one month.
Tami Reller, finance and marketing head of Microsoft's Windows division, said yesterday: "Windows 8 upgrade momentum is outpacing that of Windows 7," speaking at an investor conference held by Credit Suisse.
Previous versions of Microsoft operating systems sold considerably fewer licenses than Windows 8 in a comparable period, with XP shipping 8 million units in the month following its launch in 2002, and Microsoft Vista selling around 10 million licenses in the first 30 days following its introduction in 2006.
In raw figures, Windows 8′s first month has been around twice as strong as for Windows Vista, and four times as strong as that of Windows XP.