Driver Details

Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

Dell OptiPlex 990 System BIOS

This package provides the Dell System BIOS Update and is supported on Dell OptiPlex 990 for Windows and DOS Operating Systems.

Fixes & Enhancements

Fixes:
- Update to the latest CPU microcode to address CVE-2017-5715 and associated Intel Reboot issue.

Enhancements:
- Not Applicable.

Version

Version A23, A23

Category

BIOS

Release date

07 Mar 2018

Last Updated

07 Mar 2018

Importance

Available formats

File Format:Windows/DOS
File Name:O990-A23.exe
Download Type:HTTP
File Size: 5 MB
Format Description: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.
To ensure the integrity of your download, please verify the checksum value.
MD5:
10a056c2f872a4a52a009f0d2281bb02
SHA1:
b75181724c13fefead328ba4caa292e55f6b5dc2
SHA-256:
21adcb687d53461bcc2cd10cab76f860b73f72c8d70452a9c7b25b5805cec8b7

By downloading, you accept the terms of the Dell Software License Agreement.

Applies to
Dell Optiplex 990
Installation instructions
BIOS Update Executable for Windows/DOS

Download
1. Click Download File, to download the file.
2. When the File Download window appears, click Save to save the file to your hard drive.

Run the BIOS update utility from Windows environment
1. Browse to the location where you downloaded the file and double-click the new file.
2. Windows System will auto restart and update BIOS while system startup screen.
3. After BIOS update finished, system will auto reboot to take effect.

Run the BIOS update utility from DOS environment (Non-Windows users)
1. Copy the downloaded file to a bootable DOS USB key.
2. Power on the system, then Press F12 key and Select "USB Storage Device" and Boot to DOS prompt.
3. Run the file by typing copied file name where the executable is located.
4. DOS System will auto restart and update BIOS while system startup screen.
5. After BIOS update finished, system will auto reboot to take effect.

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Note 1: You will need to provide a bootable DOS USB key. This executable file does not create the DOS system files.
Note 2: Please make sure you suspend BitLocker encryption before updating BIOS on a BitLocker enabled system.
If you don't enable BitLocker on your system you can ignore it.
Important Information
1. Please note that if the A04 or before A04 BIOS is currently installed on your system you must first update to A05 BIOS and then flash to the latest A-rev BIOS.
2. Please note that if the A05 or after A05 BIOS and before A10 is currently installed on your system you must first update to A10 BIOS and then flash to the latest A-rev BIOS.
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Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

Dell highly recommends applying this update as soon as possible. The update contains changes to improve the reliability and availability of your Dell system.