If you install ROS and not to eject the CD, the first installation step goes fine. If you remove the CD the system hangs at "Flushing cache". This error occurs if the virtual machine has <=128Mb of RAM.
P.S. If you try to boot after installation: "freeldr.sys not found"
- is duplicated by
CORE-9091 66087 - Hangs flushing cache end of first stage.