After 1,240,000,000 hours of testing in public in 190 countries finally Microsoft launch Windows 8 yesterday. Users can now download and buy Windows 8 for their PCs and start buying numerous new devices. According to Microsoft, there are now over 1,000 certified Windows 8 PCs. The other major launch for Microsoft was the opening of the Windows Store, which is now available in 231 markets. The Store will feature both apps for the new Windows 8 user interface, as well as links to existing desktop apps. Windows 8 will support over 420 million peripherals, including printers, mice and keyboards. Microsoft announced that they had now sold more than 670 million Windows 7 licenses. According to the company’s own data, that’s the “fastest adoption of any OS ever".