REDMOND, Wash. — June 1, 2015 — On Monday, Microsoft Corp. announced that Windows 10 will be available July 29 in 190 countries. Windows 10 will help people be more productive and have more fun, with a personal and natural experience that works across all their devices. Familiar, yet better than ever, Windows 10 will deliver ongoing feature innovations and security updates. Windows 10 will be available as a free upgrade to people using Windows 7 and Windows 8.1,1 enabling hundreds of millions of people around the world to upgrade to Windows 10 for free.