Ø Do you have the latest BIOS/firmware versions installed? Ø Also you could try installing without selecting the "Virtualization" option during centos installation.. does it boot then (on baremetal without Xen) ? Ø -- Pasi Yes, I have the latest firmeware, and yes, if “Virualization” is OFF (in the BIOS), XEN works fine – but I cannot install new VMs. MtK -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20100615/514c4c17/attachment-0006.html>