Microsoft on Tuesday officially released its first update to the Windows 10 Technical Preview operating system, which it first launched on Sept. 31 and is already being used by 1 million people. The Windows 10 Technical Preview is a sample taste of the brand new Windows 10 operating system that will launch next year. So far, users have been able to get a taste of the new windowed-Modern apps, the return of the Start Menu with live tiles and more. Now, Microsoft has a new version that early testers can take advantage of.