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

Before updating, please read the installation instructions and important information noted below.

Dell Inspiron 5455/5555/5755 System BIOS System BIOS A12

Restart required
This package provides the Dell System BIOS update and is supported on Dell Inspiron 5455/5555/5755 for Windows and DOS Operating Systems.
To view all drivers for your Inspiron 5555, go to Drivers and downloads.
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5455A12.exe
Enter the Service Tag of your device to check the compatibility of this download with your device.

File Format: CPG BIOS Executable for Windows/DOS
File Name: 5455A12.exe
File Size: 6.53 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:
a081a7c2225871c49b694b3e68a56e90
SHA1:
31c48c1ba16fa86cafb1ce8ec64e480dd2a31246
SHA-256:
f253164f43d294aadad9d636b7b4bab9ec28baac39903406d292b2594afc8f67

Fixes & Enhancements

Fixes
- Not Applicable.

Enhancements
- Improved dGPU VBIOS VRAM support.
- Improved BIOS Flash utility.
Read More

Version

A12, A12

Release date

02 Sep 2016

Download Type

System BIOS

Category

BIOS

Importance

Recommended
Dell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.

Additional details

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Dell Inspiron 5455/5555/5755
[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 if Legacy Boot Mode(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.

[Run the BIOS update utility from DOS environment if UEFI Boot Mode (Non-Windows users,Load Legacy Option ROM Disabled)]
1. Copy the downloaded file to a bootable DOS USB key.
2. Power on the system, then go to BIOS Setup by pressing F2 and go to "Boot > Boot List Option"
3. Change "UEFI" to "Legacy" of Boot List Option
4. Go to "Exit > Exit Save Changes" and reboot system.
5. Press F12, then Select "USB Storage Device" and Boot to DOS prompt.
6. Run the file by typing copied file name where the executable is located.
7. After BIOS update finished, system will auto reboot.
8. Go to BIOS Setup by pressing pressing F2 and go to "Boot > Boot List Option"
9. Change "Legacy" to "UEFI" Boot Option.
10. Load Legacy Option ROM->Enabled
11. Go to "Exit" > Exit Save Changes and reboot system

Reboot will be required

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

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