device: 0.836 graphic: 0.816 PID: 0.704 semantic: 0.669 performance: 0.621 network: 0.548 files: 0.478 other: 0.468 debug: 0.452 vnc: 0.439 boot: 0.415 socket: 0.385 KVM: 0.235 permissions: 0.232 INT instruction bug in WindowsXP This bug is in -no-kvm mode. In windowsXP at IDT entry 2&8 is Task gate when application use INT 2 or INT 8 it will cause blue screen in XP. I found it should cause #GP not generate hw interrupt. also I check this bug with -enable-kvm and works correctly. Which QEMU version did you use here? Can you still reproduce this problem with the latest version of QEMU (currently 2.8)? [Expired for QEMU because there has been no activity for 60 days.]