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Dell OptiPlex 755 System BIOS A04

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important software information
company name:
Dell
license: Freeware
minimum requirements: No special requirements.
functional limitations:
Dell OptiPlex 755 System BIOS A04 description
Level of Importance: Urgent
Dell highly recommends applying this update as soon as possible. The update contains changes to improve the reliability and availability of your Dell system.

Fixes and Enhancements
1. Removed China (Sinosun) TPM support.
2. Resolved defect with the floppy IDE redirection feature.
3. Optimized PCI-Express training algorithm for certain multi-head video cards.
4. Added ImageServer support.
5. Added SATA legacy mode support for older operating systems.
6. Improved handling of scenario where system runs out of Option ROM space.
7. Updated TxT AC Module to 1.3.
8. Added support for systems with no TPM installed.
9. Updated ME firmware to 1125 (UUID fix for AMT provisioning).
10. Improved hard drive password support in RAID mode.
11. Added support for RAID 0.
12. Changed default power policy to support MEDIASABLE SKU.

Installation Instructions
Installation Instructions for the Universal (Windows/ DOS) format

1. Download file to Desktop

2. Use one of the methods below to flash the Bios.

* Run the BIOS update utility from Windows environment

* Run the BIOS update utility from DOS environment (Non-Windows users)

Download file to Desktop

The file O755-A04.EXE is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.

1. Click Download now.
The File Download window appears.

2. Click the Save button.
The Save As window appears.

3. Select Desktop using the drop-down menu to the right of Save in.

4. Click the Save button.
A progress meter moves as the download is completed.

5. If necessary, click X in the upper right-hand corner of the Download Progress Window to close it upon completion.

NOTE: Shut down all other applications prior to running the BIOS update utility. The update utility reboots your system in order to get the new BIOS loaded.

Run the BIOS update utility from Windows environment

1. Double click the Icon on your desktop labeled O755-A04.EXE.
The Dell BIOS Flash window appears

2. Click the Continue button.
The message Pressing OK will close all applications, shut down Windows, Flash the BIOS, then reboot. appears.

3. Click the OK button.
The system will restart and the BIOS Flash will be completed.

Run the BIOS update utility from DOS environment (Non-Windows users)

NOTE: You will need to provide a bootable DOS diskette. This executable file does not create the DOS system files.

1. Copy the file O755-A04.EXE to a bootable floppy.

2. Boot from the floppy to the DOS prompt.

3. Run the file by typing Y:\O755-A04.EXE (where y is the drive letter where the executable is located).

It is highly recommended to always use the most recent driver version available.

Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games.

Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.. Laptops, Desktop Computers, Monitors, Printers & PC Accessories | Dell. From personal computing to small, medium or large business, Dell solutions come fully stocked. Find your solutions with Dell laptops, desktops, monitors, printers and computer accessories.
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