I have three NUC7PJYH1 and I can't disable UEFI. When I go into the Visual BIO I can see the option is checked but I can't uncheck it. I've tried updating the BIOS version and restoring the default settings but that doesn't work. I need to disable UEFI so that I can boot Stratodesk No Touch OS from the internal SSD. How can I disable UEFI?