Sometimes When I attach a virtual iso to a virtual Windows (doesn't matter if the vm is a Windows 7 or Windows XP) the vm become stuck. I don't know if the bug is for Windows or kvm. Anybody hava had the same problem?
First, as I asked in a different BZ, this is not the right product for kvm.
Please use either Fedora/RHEL.
About this issue, it might be because libvirt passes cache=off to the cdrom (if you use libvirt). Try to use cache=writeback for the cdrom drive.