Despite the fact that Windows 8 has received criticism from some developers, Microsoft has announced that 40 million licenses were sold in just over one month. Windows 8 reached this achievement faster than Windows 7. Windows 7 in its first 10 weeks sold 60 million units at the end of 2009.
Tech research firm StatCounter has made it known that not all 40 million people are actually using Windows 8. According to the firm's figures about 15 million people are running the OS. This is about one percent of the world's 1.5 billion PCs.
Valve founder Gabe Newell has been the most vocal with his disapproval with Windows 8. He feels the OS is too closed of a system. Windows 8 requires a certification for third party apps to access certain functions, including it touchscreen interface.