View UEFI BIOS Event logs

The UEFI BIOS Event log viewer provides the brief information about UEFI BIOS events. Do the following to view the logs:

Restart the computer. When the logo screen is displayed, press F1.
Select Main > BIOS Event log. Then, press Enter. The UEFI BIOS Event log interface is displayed.
Navigate the interface by pressing the following keys, and then check details by selecting each item.
- ↑↓: Move keyboard focus
- PgUp / PgDn: Scroll page
- Enter: Select
- F3: Exit

The following UEFI BIOS event logs might be listed on your screen depending on UEFI BIOS activities. Each log consists of a date, a time, and a description of the event.

Power On event: This log shows the Power On Self Test (POST) routine has started with the power-on process. It includes the power-on reason, the boot mode, and the shutdown reason.
Subcomponent Code Measurement event: This log shows the subcomponent code measurement has worked. It includes the validation result of each component.
System Preboot Authentication event: This log shows what credential is provided to gain preboot authentication. It includes the installed password, the password type, the input device, and the authentication result.
BIOS Password Change event: This log shows the change history of the UEFI BIOS passwords. It includes the password type, the type and result of the event.
Subcomponent Self-healing event: This log shows the information about the subcomponent where the recovery event occurred. It includes the cause and result of the event, and the recovered firmware version.
BIOS Setup Configuration Change event: This log shows the change history of the UEFI BIOS Setup configuration. It includes the item name and value.
Device Change event: This log shows the change history of devices. It includes the cause and type of the event.
System Boot event: This log shows which device was utilized to boot the system. It includes the boot option, the description, and the file path list.
System Tamper event: This log shows the occurrence of system tamper events. It includes the cause and type of the event.
POST Error event: This log shows the occurrence of errors during the POST routine. It includes the error code.
Flash Update event: This log shows the occurrence of flash update. It includes the cause and result of the event, and the updated firmware version.
Set On-Premise event: This log shows the change history of on-premise boot settings. It includes the value of on-premise settings and the change method.
Capsule Update event: This log shows the occurrence of UEFI capsule firmware update. It includes the cause and result of the event, and the updated firmware version.
Log Cleared event: This log shows UEFI BIOS event logs are cleared. It includes the cause and result of the event.
Shutdown / Reboot event: This log shows the UEFI BIOS is successfully shut down or the system is rebooted. It includes the cause and type of the event.