Download Files
File Format: This file format consists of a BIOS executable file. The Universal (Windows/MS DOS) format can be used to install from any Windows or MS DOS environment.
File Name: O990-A20.exe
File size: 5.59 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: d55b8e967072e30e98910b5cd649462b
SHA1: 95c5021ffd8bcc14f63b0905a300e81a7740d5a8
SHA-256: d1a6d83b15449cb19e577f41250840a2cd9f23b5f5d45ba3357baed24419941e
Fixes & Enhancements
- Updated Intel ME Firmware to address security advisory INTEL-SA-00075 (CVE-2017-5689).
Important Information
- If your system BIOS version is A04 or a version earlier to A04, update the BIOS to version A05 and then install the latest update.
- If your system BIOS version is A05 or a version earlier to A10, update the BIO to version A10 and then install the latest update.
Supported Operating Systems
Installation instructions
Updating the BIOS from Windows
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.
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)
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 power or interrupt the BIOS update process during the update.
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:\ OptiPlex_990_X.Y.Z.exe
Where C is the drive letter of the USB device where the executable file is located and OptiPlex_990_X.Y.Z.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.