According to Bug Check 0xF4: CRITICAL_OBJECT_TERMINATION, 0x000000F4 means I have a “CRITICAL_OBJECT_TERMINATION” inside my virtual machine.
As cause MSDN states that “Several processes and threads are necessary for the operation of the system. When they are terminated for any reason, the system can no longer function.”
which obiously means that Xen probably is configured to stop necessary processes that allow the OS to be installed.