A warm and cozy, open-source operating system compatible with existing apps, games and drivers. The main idea is to efficiently create a compatible environment for existing software and provide the best user experience on a personal computer. Greentea OS is an operating system based on open source code. The main idea of the project is to create a compatible environment for the existing software as fast and as qualitatively as possible and provide the user with the best experience with a personal computer. Compatibility Goals Greentea OS does not limit itself just to running ".exe" and ".sys" files. Overall compatibility goals are: GUI and console .exe apps (including software preservation in general) targeting legacy Win32 API (superseded by WinUI/WinRT) NT drivers (in the sandboxes/virtualized environments, any 64-bit version since NT 6.1 up to latest officially unsupported one) This includes anti-cheats and other low-level software Unix ELF executables (in a Docker-like environments) Android .apk apps Framework for other platforms emulation and their software preservation Full backwards compatibility of the most system APIs and services so you can trust Greentea OS as a stable platform CPU features emulation like AVX to prolong hardware lifetime New Software Ecosystem Despite broad compatibility goals, Greentea OS is an independently developed and distinct open-source operating system, engineered to provide a versatile and robust computing environment. While it offers broad compatibility with various existing software formats and APIs, Greentea OS is not, and is not intended to be, a derivative of Microsoft Windows, but a complementary alternative. Instead, it represents a novel software ecosystem built on open-source principles. Greentea OS serves as both a platform for executing a wide array of legacy and contemporary applications and a foundation for developing innovative new software within its unique architecture. Our focus is on providing a secure, adaptable, and community-driven alternative for diverse computing needs.