Lenovo ThinkPad Edge E520 (English) User Guide - Page 138
Menu item, Selection, Comments, Password, UEFI Update Option, Enabled, Memory Protection, Disabled
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Security menu items Table 5. Security menu items Menu item Submenu item Password Selection UEFI Update Option Flash UEFI Updating by End-Users • Disabled • Enabled Memory Protection Execution Prevention • Disabled • Enabled Virtualization Intel Virtualization Technology • Disabled • Enabled I/O Port Access 120 User Guide Intel VT-d Feature Ethernet LAN Wireless LAN WiMAX Wireless WAN • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled Comments Refer to "Security menu" on page 114 and "Using passwords" on page 59. If you select "Enabled", all users can update the Flash UEFI. If you select "Disabled", only the person who knows supervisor password can update the Flash UEFI. Some computer viruses 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. If you select "Enabled," a VMM (Virtual Machine Monitor) can utilize the additional hardware capabilities provided by Intel Virtualization Technology. Intel VT-d is Intel Virtualization Technology for Directed I/O. When enabled, a VMM can utilize the platform infrastructure for I/O virtualization. If you select "Enabled", you can use the Ethernet LAN device. If you select "Enabled", you can use the Wireless LAN device. If you select "Enabled", you can use the WiMAX device. If you select "Enabled", you can use the Wireless WAN device.