If you are receiving an error on your device manager after a fresh install of a Toshiba laptop and the unknown device shows only the information Unknown device ACPI\TOS620A then you need to install the HDD Protection Utility from the toshiba downloads relevant to your system. This is part of the ACPI interface. Further Reading Advanced Configuration and Power Interface: Open standard, Operating system, Power management, Cross- platform, Intel Corporation, Microsoft, Toshiba, … Sleep mode, Hibernate (OS … Read entire article »