Lenovo ThinkPad T420 (English) User Guide - Page 207
Enabled, UEFI BIOS Update Option, Memory Protection, Disabled, Virtualization, I/O Port Access - bios update utility
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Table 9. Security menu items (continued) UEFI BIOS Update Option Flash BIOS Updating by End-Users • Disabled • Enabled Memory Protection Flash Over LAN Execution Prevention • Disabled • Enabled • Disabled • Enabled Virtualization Intel Virtualization Technology • Disabled • Enabled I/O Port Access Intel VT-d Feature • Disabled • Enabled Ethernet LAN Wireless LAN WiMAX Wireless WAN • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled If you select "Enabled", all users can update the UEFI BIOS. If you select "Disabled", only the person who knows supervisor password can update the UEFI BIOS. Enable your computer's UEFI BIOS to be updated (flashed) over an active network connection. 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. Chapter 8. Advanced configuration 189