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