Error 0x5D in Qemu for Windows The reason to use qemu for Windows is that the mouse in emulated Windows works well while it is unusable in qemu at Ubuntu. Alternative solution/bug is mouse usability in qemu for Linux. Well-known issue of error 0x5D when booting Win 7 x64 on qemu without kvm, marked as resolved at Linux. Used qemu for Windows downloaded from http://qemu.weilnetz.de/ Tested on qemu 2.3.94 64-bit and qemu 2.4.0 32-bit. Options : qemu-system-x86_64.exe -m 1536 -cpu qemu64,+nx,+pae,+mce,+cx8,+apic,+sep,+mtrr,+pge,+mca,+cmov,+pat,+pse36,+clflush,+acpi,+mmx,+fxsr,+sse,+sse2,+ss,+fxsr,+sse,+sse2,+ss,+de,+mtrr,+mca,+clflush win_7_work.qcow2 On qemu at Ubuntu with kvm Win7 x64 works ,but mouse is unusable as mentioned above.