Hi Sylvia,
I will try with the previous bios, and let you know the results.
Yes, I have reset the bios back to the defaults, then only change is to set the boot device in the UEFI config of the Visual BIOS.
After the first post, I then reverted to only setting the TESTSIGNING ON boot option from the bcdedit tool and this will always cause the ACPI_BIOS_ERROR. The current OS is Windows 8 Embedded Standard. If I reboot using a bootable USB into a Windows 8 installation, open a Windows PE command prompt, remove the TESTSIGNING option, and reboot, the device will boot successfully again into Windows 8 Embedded. Does this indicate that there may be issues with a driver(s)?
Also, I did create a bootable USB with XP live and when booting to this, with the BCD option TESTSIGNING ON, I also get a boot failure and an ACPI error, just displayed a little differently, as acpi,sys. I don't have the parameters that were given with this error, but could recreate this scenario also if it helps resolve this.
Finally, I can probably set up a kernel debug environment to see if I can get more information about the problem.
regards, and thanks for listening,
Mark