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Running ReactOS in qemu

user $ qemu-img create c.img 10G


user $ qemu-system-i386 -m 256 -accel tcg -k de -cdrom isos/ReactOS-0.4.14-release-15-gb6088a6.iso -drive file=c.img,format=raw

Maybe faster, but harder to debug: -accel tcg,thread=multi: warning: Guest expects a stronger memory ordering than the host provides; This may cause strange/hard to debug errors

user $ qemu-system-i386 -m 256 -accel tcg,thread=multi -k de -cdrom isos/ReactOS-0.4.14-release-15-gb6088a6.iso -drive file=c.img,format=raw

After successfully installing ReactOS I had problems to get past the login since ctrl-alt-delete wasn't possible, from the monitor I couldn't sent it with sendkey.

When reinstalling ReactOS the installed system gets booted and configured. There I run regedit and add DisableCAD DWord =1 to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System .


  • ReactOS is 32bit and single core, 64bit is in development