graphic: 0.885 device: 0.817 ppc: 0.803 x86: 0.792 architecture: 0.740 peripherals: 0.691 performance: 0.682 network: 0.630 semantic: 0.630 socket: 0.618 debug: 0.617 vnc: 0.572 arm: 0.572 kernel: 0.527 permissions: 0.525 user-level: 0.508 KVM: 0.502 hypervisor: 0.489 PID: 0.484 files: 0.434 mistranslation: 0.423 risc-v: 0.390 boot: 0.386 register: 0.375 virtual: 0.341 VMM: 0.322 assembly: 0.276 TCG: 0.246 i386: 0.228 Windos XP BSOD with HP Photosmart usb device attached https://bugzilla.redhat.com/show_bug.cgi?id=524723 has all the details of the problem. I was just testing attaching a USB device to see if it really worked, and tried my HP Photosmart C5580 All-in-One printer/scanner, and the Windows XP box then started getting bluescreens and crashing at random (fairly short :-) intervals. My latest attempt was on a fedora rawhide system with pretty up to date software (qemu-kvm-0.11.0-2.fc12.x86_64), and the crashes still happen. A reply to that bugzilla recommended adding this upstream bug, so here it is. Please use qemu-1.0 + ehci. The UHCI layer seems to cause this problem when handling some USB 2.0 devices. I had similar problems but with EHCI + qemu-1.0 it was fixed. See docs/usb2.txt for USB 2.0 support. Can you still re-create this issue with the latest version of QEMU? If not, I think we should close this bug nowadays... [Expired for QEMU because there has been no activity for 60 days.]