Lenovo S540 Uefi Bios Update Option, Disabled If OS, Optimized is, Virtualization, Port Access

Table 5. Security menu items (continued)

Menu item	Submenu item	Selection		Comments
	Physical Presence for	•	Disabled	This option enables or disables the
	Clear	•	Enabled	confirmation message when you
				clear the security chip.
UEFI BIOS Update Option	Flash BIOS Updating by	•	Disabled	If you select Enabled, all users can
	End-Users	•	Enabled	update the UEFI BIOS. If you select
				Disabled, only the person who
				knows the supervisor password can
				update the UEFI BIOS.
	Secure RollBack	•	Disabled (If OS	If you select Disabled, you can flash
	Prevention		Optimized is	the older version of the UEFI BIOS.
			Disabled)
		•	Enabled (If OS
			Optimized is
			Enabled)
Memory Protection	Execution Prevention	•	Disabled	Some computer viruses and worms
		•	Enabled	cause memory buffers to overflow.
				By selecting Enabled you can
				protect your computer against
				attacks by such viruses and worms.
				If you find that an application
				program does not run correctly after
				choosing Enabled, select Disabled
				and reset the setting.
Virtualization	Intel (R) Virtualization	•	Disabled	If you select Enabled, a Virtual
	Technology	•	Enabled	Machine Monitor (VMM) can utilize
				the additional hardware capabilities
				provided by Virtualization
				Technology.
	Intel VT-d Feature	•	Disabled	Intel VT-d stands for Intel
		•	Enabled	Virtualization Technology for
				directed I/O. When enabled, a VMM
				can utilize the platform infrastructure
				for I/O virtualization.
I/O Port Access	Ethernet LAN	•	Disabled	If you select Enabled, you can use
		•	Enabled	the Ethernet LAN device.
	Wireless LAN	•	Disabled	If you select Enabled, you can use
		•	Enabled	the Wireless LAN device.
	Wireless WAN	•	Disabled	If you select Enabled, you can use
		•	Enabled	the Wireless WAN device.
	Bluetooth	•	Disabled	If you select Enabled, you can use
		•	Enabled	the Bluetooth device.
	USB Port	•	Disabled	If you select Enabled, you can use
		•	Enabled	the USB connectors.
	Memory Card Slot	•	Disabled	If you select Enabled, you can use
		•	Enabled	the memory card slot for an SD card
				or a MultiMediaCard.
	Integrated Camera	•	Disabled	If you select Enabled, you can use
		•	Enabled	the camera.

94User Guide