QEMU on Windows QEMU is an emulator for various CPUs. It works on Linux, Windows, FreeBSD and Mac OS X. Windows version is in an alpha stage. I hope I can provide useful information on development and usage of the software. What's New? Jun 23, 2016: created Qemu-2.6.0 (see Changelog). Now compiled for running on x86_64 Switched back to pure cygwin compilation with mingw64-x86_64 tool chain Feb 16,