The OS post-load code loops until the computer responds to SSH. The most common load failure is due to the computer never responding. This is often caused by a blip which prevents the computer from obtaining a private IP address.
Problems also occur when the public IP isn't obtained the first time the computer attempts to request one. If the first attempt fails, the VCL code does not attempt any corrective measures.
Load failures would be greatly reduced if the code attempted to restart the computer after some amount of time and checking again for an SSH response.
Many problems would also be corrected if the code detected that the public IP wasn't obtained via DHCP, and called ipconfig /renew.