Windows 2012 - Boot Fail (System Reboot)

[robinsmidsrod]

Most likely you have an additional initrd loaded that is not compatible with wimboot. You should follow the http://ipxe.org/howto/winpe tutorial exactly (it's simpler now) and see if you can get things to work. Also adding a imgstat command before boot command should allow you to figure out possibly what the problem is. Adding the "pause" parameter to the wimboot kernel might also help you out. Make sure you use the latest version of wimboot.