A Microsoft executive claims that the company has sold more than 40 million Windows 8 licenses in the month since the launch.
Tami Reller, finance and marketing head of the Windows business, who is one of the new co-heads of the Windows unit, claims that the operating system is setting a faster pace than Windows 7 three years ago.
According to the International Business Times, if the figures are correct, then the sales number represents a solid start for the touch-friendly operating system.
Windows 7 sold just over 60 million units in the first 10 weeks on sale at the end of 2009.
Reller did not give any breakdowns for his figures, but suggested much of the growth was coming from upgrades.
What he did not point out was that most of the sales at this point are to PC manufacturers, who in turn sell a large number of machines to companies. Few companies are actually using the new operating system.
StatCounter recently claimed that 15 million PCs are actually running Windows 8.
Reller also did not say how sales of Microsoft's new Surface tablet were going.
Microsoft said it had sold more than 750,000 Xbox game consoles in the United States. This is down from 960,000 sales in the same week a year ago.