Microsoft has sold 60 million licenses and upgrades for its new Windows 8 operating system in the 10 weeks since its launch, a Microsoft executive said at the Consumer Electronics Show on Tuesday. At the 11th Annual J.P. Morgan Tech Forum , Windows Chief Marketing Officer and Chief Financial Officer Tami Reller announced that Windows 8 has sold 60 million licenses to date. This represents the cumulative sales of Windows 8 including both upgrades and sales to OEMs for new devices. This is a similar sales trajectory that Microsoft saw with Windows 7.

"We have seen a significant increase in the number of Windows 8 certified systems since general availability at the end of October," Reller said. "There are now more than 1,700 certified systems for Windows 8 and Windows RT."

Reller did not say how many of its new Surface tablets Microsoft had sold.

Earlier this week Microsoft also highlighted strong growth in developers building for Windows 8. Since the opening of the Windows Store the number of apps has quadrupled and Microsoft says it has passed the 100 million app download mark - just two months after general availability.