We found a thread posted by ycavan ( XDA Senior Member ) on XDA Developers, This guy went crazy, he had figured out how to install Windows7 on Asus Zenfone2 smartphone. Zenfone 2 runs windows 7 smoothly, no major bugs found.
Zenfone 2 Qemu-KVM kernel running Windows, rendered with aSpice
Video presentation of Windows 7 operating system running naively on Asus Zenfone 2 smartphone, here Ycavan had installed Windows7 on Asus Zenfone2 ZE551 / ZE551ML variant. Which has 2.3 GHz Intel Atom Z3580 Quad Core Processor and 4GB of RAM.