Just think this will help others. If you want to use any oem PC like those bought off the shelf for freenas or any other os than the pre-installed os you need to tinker. All you need to do is open the BIOS then disable secure boot and enable legacy boot. After that disable the boot devices that doesn't apply to you and move the one you want to the top. Then reboot. If that failed then you need to enter the bios again and enable custom keys and clear keys. Then reboot. If this still hasn't worked do a sanity check and make sure you have a good iso and that it's selected. Then continue to tinker with combinations of these options. Worked for my server and many of the PC's I have to deal with at work.
