Lenovo ThinkPad T420si (English) User Guide - Page 185
Enter, Disabled, Enabled, UEFI BIOS Update Option, Memory Protection, UEFI BIOS. If you select
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Table 6. Security menu items (continued) Clear Security Chip • Enter Intel TXT Feature UEFI BIOS Update Option Flash BIOS Updating by End-Users • Disabled • Enabled • Disabled • Enabled Memory Protection Flash Over LAN Execution Prevention • Disabled • Enabled • Disabled • Enabled • BIOS ROM String Reporting: BIOS text string • ESCD Reporting: Extended system configuration data • CMOS Reporting: CMOS data • NVRAM Reporting: Security data stored in the Asset ID • SMBIOS Reporting: SMBIOS data Clear the encryption key. Note: Only if you select "Active" for Security Chip, this item appears. Enable or disable Intel Trusted Execution Technology. 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. Chapter 8. Advanced configuration 169