I'm using CCTK to apply some BIOS changes to several different systems.  I want to set the BIOS back to defaults before applying the new changes.  --sysdefaults=reset works on the newer systems, but doesn't work on the older computers like the Optiplex 755 and 960.  I get the error "Either the system hardware or the BIOS version does not support the option.  To resolve the BIOS version issue, upgrade the BIOS to the latest version."  I also tried using --cmosdefaults=enable, but that gives me the error "The option 'cmosdefaults' is not available or cannot be configured through this tool."  I verified both the 755 and 960 are running the latest BIOS.  Do these models not support a BIOS reset command?