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Statement of Volatility HP ProDesk 400 G1 Desktop Mini

Statement of Volatility
HP confirms that AMD-based business desktop HP EliteDesk 400 G1 systems contain DDR3 volatile memory (memory amount depends on the customer configuration). In addition, the motherboard in the condition originally shipped without subsequent modification or the addition or installation of any applications, features, or functionality, contain the following nonvolatile memory: Real Time Clock battery backed-up configuration memory (256 Bytes), DIMM Serial Presence Detect (SPD) configuration data (256 Bytes per module, 128 Bytes programmable), Serial Peripheral Interface (SPI) ROM for System BIOS (8M Bytes) and Super I/O’s: masked keyboard ROM (overall 2K Bytes). In addition, these units contain a Trusted Platform Module (TPM) that contains 16K Bytes of non-volatile memory for user data. The volatile memory will not hold any user data once power has been removed for 30 seconds or longer.
The following procedure shows the steps that should be taken to restore the Non-Volatile memory found in the Intel-based HP ProDesk 400 G1 systems:
  1. Download the latest BIOS (system ROM) from the HP website.
  2. Follow the instructions to flash the BIOS that are found on the website.
    Flashing the BIOS will reset it back to factory settings.
  3. Turn on the system, and while system is powering on, and after the HP splash screen, press the F10 key to enter BIOS setup screen.
  4. Select Security > System Security from the main menu. If the Embedded Security Device Support option is set to “Disable”, skip to step 7.
  5. To erase all security keys from the TPM:
    Under Embedded Security Device in the System Security menu, configure Reset to Factory Settings to Reset.
      note:
    Although the TPM security keys will be cleared, data in the non-volatile memory indices may not be. Data stored in these indices should not contain security sensitive information. If an application locks down and secures the non-volatile indices, these indices cannot be cleared.
  6. Press F10 to accept changes.
  7. To clear the secure boot key database:
    1. Enter the F10 setup utility.
    2. Go to the Security menu.
    3. Select Secure Boot Configuration.
    4. In the Key Management section, select clear Secure boot keys.
    5. Use space key to select clear.
    6. Press the F10 key to accept changes.
    7. From the main menu select File > Save Changes and Exit.
  8. If the Ownership Tag or Asset Tag is set, manually clear it under Security > System Ids.
  9. Select File > Save Changes and Exit.
  10. To clear the Setup or Power-On passwords if set, and clear any other settings, power down the computer and remove the AC power cord and the computer hood.
  11. Locate the green/blue two pin password jumper on header E49 (labeled PSWD) and remove it.
  12. Remove the AC power, wait 10 seconds until the unit AC power has drained out, then press the clear CMOS button. This is typically a yellow push button (labeled CMOS).
  13. Replace the hood and AC power cord and turn the computer on. The passwords are now cleared and all other user-configurable, non-volatile memory settings are reset to their factory default values.
  14. Enter the F10 setup utility.
  15. Select File > Default Setup > Restore Factory Settings as Default. This will set the default settings back to the factory defaults.
  16. Select File > Apply Defaults and Exit.
  17. Shut down the computer, remove the AC power cord and place the (blue/green) jumper back on header E49. Replace the computer hood and power cord.
If Computrace is enabled on the computer, see the service provider for instruction to disable the feature.

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