Acer Aspire S5-391 Service Manual page 55

5. Write UUID to EEPROM (Create UUID from Intel WFM20.pdf)
Input:
dmitools /wu
6. Write Asset Tag to EEPROM
Input:
dmitools /wa Acer Asstag
NOTE:
When running examples 2 ~ 5, restart the system to make the new DMI data effective.
System Utilities 2-19