C Statement of Volatility
HP conrms that business desktop systems contain DDR3 or DDR4 volatile memory (memory amount depends
on the customer conguration). In addition, the motherboard in the condition originally shipped without
subsequent modication or the addition or installation of any applications, features, or functionality, contain the
following nonvolatile memory: Real Time Clock battery backed-up conguration memory (256 Bytes), DIMM
Serial Presence Detect (SPD)
conguration 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:
1. Download the latest BIOS (system ROM) from the HP website.
2. Follow the instructions to ash 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, congure 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:
a. Enter the F10 setup utility.
b. Go to the Security menu.
c. Select Secure Boot Conguration.
d. In the Key Management section, select clear Secure boot keys.
e. Use space key to select clear.
f. Press the F10 key to accept changes.
g. 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.
112 Appendix C Statement of Volatility
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