semantic: 0.904 device: 0.897 assembly: 0.896 other: 0.895 instruction: 0.873 graphic: 0.870 boot: 0.868 vnc: 0.857 socket: 0.849 KVM: 0.816 mistranslation: 0.808 network: 0.804 DRIVER_IRQL_NOT_LESS_OR_EQUAL booting WIndows XP with Synaptics driver installed Positng the issue here since I did not get any reply on the ML. I was trying to update some windows XP (SP3) images in kvm. It worked fine several times but last time I added mass storage drivers to sysprep and now on the second boot after reseal (the first is mini-setup) I get a BSOD with message DRIVER_IRQL_NOT_LESS_OR_EQUAL. I can post the screenshot if somebody thinks it is interesting enough. The same image works on hardware (which has controllers different from the qemu PIIX3) and in VirtualBox (with the default PIIX4 as well as PIIX3) so long as IO apic is enabled). I am not sure if this is an error with the MS drivers or how they are used in sysprep in this particular case or if his is some strange error in qemu emulation in the PIIX3 controller or elsewhere. The image is originally created on hardware with MP acpi (not virtualization). Note that most of the section is generated by sysprep (the drivers referencing C:\windows), only small part at the end is generated by my script for additional drivers (references C:\drivers). The previous images that did not have this section worked only on controllers compatible with the MS generic PCI IDE driver (and also on KVM). Just to be sure, you are not using the virtio-blk driver for Windows here? I have seen similar crashes with the older version of virtio-blk when used on recent versions of KVM. On 7 October 2010 11:05, Jes Sorensen