In the UEFI settings you can modify very fundamental system properties, e.g. disable booting from USB. Access to these settings should be protected by a password.
Instructions for IGEL UD LX devices
By default no UEFI password is set on IGEL UD devices. To set a password, do the following:
The UEFI menu opens.
The Setup Utility opens.
The system boots, and the UEFI settings are now password-protected
Instructions for 3rd-party devices converted with UDC3
Alternatively, try pressing F12 (in general), F10 (Intel devices) or F9 (Hewlett-Packard devices) to access the BIOS/UEFI settings. If this does not work, try pressing Del, F1 or F2 during booting.