This package contains the Dell system BIOS update. BIOS is a firmware that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives, and other devices. Updating the BIOS from Windows.
The following Notes apply to all the BIOS installation method:
Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If it is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com. Note 2: Do not turn off the power or interrupt the BIOS update process during the update.
Updating the BIOS from Windows
Download and Installation 1. Click Download File, to download the file. 2. Click Save to save the file to your hard drive. 3. Browse to the location where you downloaded the file and double-click the new file. The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, system restarts again.
Updating the BIOS from DOS (Non-Windows users)
Installation Note: You must provide a bootable USB drive. This executable file does not create the DOS system files. 1. Copy the downloaded file to a bootable USB drive. 2. Power on the system and then Press the F12 key. 3. Select USB Storage Device and boot to the DOS prompt. 4. Run the file by typing following command. For example: C:\Inspiron_7790_5490_CML_1.2.0.exe Where C is the drive letter of the USB device where the executable file is located and Inspiron_7790_5490_CML_1.2.0.exe is the name of the downloaded file. The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, system restarts again.
Updating the BIOS from DOS with UEFI boot mode enabled (Non-Windows users, Load Legacy Option Disabled) Installation 1. Copy the downloaded file to a bootable DOS USB drive. 2. Power on the system and then go to BIOS Setup by pressing the F2 key. 3. Go to General > Boot Sequence > Boot > Boot List Option. 4. Change UEFI to Legacy of Boot List Option. 5. Go to Exit > Save Changes and reboot system. 6. Press F12 and then select USB Storage Device and boot to the DOS prompt. 7. Run the file by typing the file name. The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, the system restarts again. 8. Go to BIOS Setup by pressing the F2 key and go to General > Boot Sequence > Boot > Boot List Option. 9. Change Legacy to UEFI Boot Option. 10. Go to Exit > Save Changes and reboot the system.
Updating the BIOS from BIOS Boot Menu (independent of operating system)
Installation 1. Copy the downloaded file to a USB drive. The USB drive does not need to be bootable device. 2. Insert the USB drive into any USB port. 3. Power on the system. 4. At the DELL logo screen, press F12 to access the one-time boot menu. 5. Select BIOS Flash Update in the Other Options section. 6. Click the ... button to browse the USB drive to locate the downloaded file. 7. Select the file and click Ok. 8. Verify the existing system BIOS information and the BIOS update information. 9. Click Begin Flash Update. 10. Review the Warning message and click Yes to proceed with the update. The system restarts and displays a progress bar at the Dell logo screen. The system restarts again when the update is complete.