Windows 8 Build 7700 is earliest known pre-milestone build of Windows 8

Windows 8 Build 7700 is a pre-release version of Windows 8, which was leaked online in January 2012. This build was not officially released by Microsoft, but it gave enthusiasts and developers an early look at the operating system's features and capabilities.

Build 7700 proves that deep into 2010—almost a year after Windows 7 shipped—Microsoft’s internal plan was still "Windows 7, but better." There was no Metro. No full-screen apps. No Charms Bar. The original vision for Windows 8 was simply a refined, more modern Windows 7. If that roadmap had survived, the disastrous reception of Windows 8 (and the subsequent panic-release of Windows 8.1, then Windows 10) might never have happened.

Keep in mind that Windows 8 is an older operating system, and it may not be the best choice for production or daily use. If you're looking for a modern and supported operating system, I recommend considering Windows 10 or Windows 11.