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-A24.exe
File size: 5.6 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: b7427565f20f8f041c20fde24fc3ccb7
SHA1: ac4520e3ef1317af4bed1b7d7fd4da72937a49b9
SHA-256: 73828299c42b02fb741c6e992973b9412935f72e3a2bc2b86d9aee020e91ec42
Fixes & Enhancements
- Firmware updates to address the Intel Security Advisory INTEL-SA-00115 (CVE-2018-3639, and CVE-2018-3640).
Important Information
- If BIOS version A04 or any earlier version is installed on your system, you must first update to BIOS version A05 before installing the latest update.
- If BIOS version A05 or any earlier version is installed on your system, you must first update to BIOS version A10 before installing the latest update.
- BIOS updates take no more than 5 minutes to be installed on your system. You can install the updates in the background while using the system.
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 BitLocker 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.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Download and Installation
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the new file.
5. 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 BitLocker 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.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
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.