Phoenix OS is an Android-based desktop operating system (similar to Remix OS) designed for x86/x64 PCs. The installer in question (V3.0.5.469) likely supports:

Phoenix OS Installer V3.0.5.469-x86-x64.exe is an installer package for Phoenix OS, a desktop-style Android distribution designed to run on x86 and x64 PC hardware. The installer filename indicates version 3.0.5.469 and supports both 32-bit (x86) and 64-bit (x64) architectures.

Phoenix OS attempts to look like Windows, featuring a Start Menu and a Taskbar.