FROM TECHNET:
Indicates the cause of the failure.
1: No LoaderXIPRom descriptor was found in the loader memory list.
2: Unable to open the RAM disk driver (ramdisk.sys or \Device\Ramdisk).
3: FSCTL_CREATE_RAM_DISK failed.
4: Unable to create GUID string from binary GUID.
5: Unable to create symbolic link pointing to the RAM disk device.