Tami Reller, Chief Marketing Officer and Chief Financial Officer at Microsoft, said in an interview that Microsoft had sold the 100 millionth license of Windows 8 and was already past that number. The number comprises of both PC as well as tablet licenses and upgrades.

Back in January Reller revealed that Redmond based operating system giant had managed to sell 60 million licenses. Considering that figure, Microsoft has managed to sell well over 10 million licenses a month on an average over the course of four months. The CMO & CFO also revealed that they have also seen quite an increase in the number of certified devices for both Windows 8 as well as Window RT and that number stands at 2,400 devices.

Reller also confirmed the existence of Windows Blue stating that the update will be bringing in a lot many new features and improvement to Windows 8 for companies as well as consumers alike. Reller said, “It will deliver the latest new innovations across an increasingly broad array of form factors of all sizes, display, battery life and performance, while creating new opportunities for our ecosystem.” There are indications that Microsoft may be bringing back the Start button in Windows Blue.

Quoting numbers about user base of SkyDrive and Outlook.com, Reller said that there are over 250 million users using SkyDrive and over 400 million active user accounts on Outlook.com. Reller, when asked about the declining PC market, said that “the PC is very much alive and increasingly mobile,” and that Windows 8 has been tailored as per the requirements of convertible laptops, notebooks and touchscreen devices.