Lenovo 336655U, 3259AD9 manual Uefi Bios Update Option

Table 5. Security menu items (continued)

Menu item	Submenu item	Selection		Comments
				prompt is displayed; the
				computer goes ahead and
				loads the operating system.
				To prevent unauthorized
				access, set the user
				authentication on the
				operating system.
	Power-On Password	•	Disabled	Refer to “Power-on
		•	Enabled	password” on page 48.
	Hard Disk1 Password	•	Disabled	Refer to “Hard disk
		•	Enabled	passwords” on page
				48.
UEFI BIOS Update Option	Flash BIOS Updating by	•	Disabled	If you select Enabled,
	End-Users	•	Enabled	all users can update the
				UEFI BIOS. If you select
				Disabled, only the person
				who knows the supervisor
				password can update the
				UEFI BIOS.
Memory Protection	Execution Prevention	•	Disabled	Some computer viruses
		•	Enabled	and worms cause memory
				buffers to overflow by
				running code where only
				data is allowed. If the
				Data Execution Prevention
				feature can be used with
				your operating system, then
				by selecting Enabled you
				can protect your computer
				against attacks by such
				viruses and worms. If after
				choosing Enabled you find
				that an application program
				does not run correctly,
				select Disabled and reset
				the setting.
Virtualization	Intel Virtualization	•	Disabled	If you select Enabled,
	Technology	•	Enabled	a VMM (Virtual Machine
				Monitor) can utilize the
	AMD-V Technology
				additional hardware
				capabilities provided by
				Virtualization Technology.
	Intel VT-d Feature	•	Disabled	Intel VT-d is Intel
		•	Enabled	Virtualization Technology
				for Directed I/O. When
				enabled, a VMM can utilize
				the platform infrastructure
				for I/O virtualization.
				Note: This sub-menu is not
				supported in models with
				an AMD CPU.

Chapter 7. Advanced configuration 101