Secure Boot Screen Options - Dell Latitude 3490 Owner's Manual

Option Description
● Enabled—enabled by default
Computrace Allows you to activate or disable the optional Computrace software The options are:
● Deactivate
● Disable
● Activate—enabled by default
CPU XD Support Allows you to enable the Execute Disable mode of the processor.
Enable CPU XD Support—enabled by default
OROM Keyboard
options:
Access
Enabled (default)
Disabled
One Time Enable
Admin Setup Allows you to prevent users from entering Setup when an Administrator password is set.
Lockout
Default Setting: The option-Enable Admin Setup lockout is disabled by default.
Master password This option is not enabled by default
lockout
SMM Security This option enables or disables additional UEFI SMM Security Mitigation protection. The operating system
Mitigation can use this feature to help protect the secure environment created by virtualization based security. The
option is disabled by default.

Secure Boot screen options

Option Description
Secure Boot This option enables or disables the Secure Boot feature.
Enable
● Disabled
● Enabled (Default)
Expert Key Allows you to manipulate the security key databases only if the system is in Custom Mode. The Enable
Management Custom Mode option is disabled by default. The options are:
● PK—enabled by default
● KEK
● db
● dbx
If you enable the Custom Mode, the relevant options for PK, KEK, db, and dbx appear. The options are:
● Save to File—Saves the key to a user-selected file
● Replace from File—Replaces the current key with a key from a user-selected file
● Append from File—Adds a key to the current database from a user-selected file
● Delete—Deletes the selected key
● Reset All Keys—Resets to default setting
● Delete All Keys—Deletes all the keys
82 System setup options
NOTE: To upgrade or downgrade TPM 2.0, download the TPM wrapper tool—software.
NOTE: The Activate, Deactivate, and Disable options will permanently activate or disable the feature
and no further changes will be allowed.
NOTE: If you disable the Custom Mode, all the changes made are erased and the keys restore to
default settings.