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: Precision_5520_1.3.4.exe
File size: 9.82 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: 1519bc18013bb75b96bc0bc53e09b276
SHA1: a6e7b3e27662e73c23cd32e54de60d7d2bc5c570
SHA-256: 4bcbc6565d319e18c13dbf3f2ee30e34c35e7360021b3aac42a357a8469ceae1
Fixes & Enhancements
Fixes:
- Fixed the security issue with the Intel Boot Guard code integrity chaining enforcement.
- Fixed the security issue with the Dell SupportAssist Pre-Boot feature.
Enhancements:
- Updated the processor microcode.
- Updated Absolute Home & Office to version 957.
- Updated the Power Delivery firmware.
Important Information
Once the BIOS is updated, you cannot downgrade it to a version before 1.3.4.
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:\ Precision_5520_X.Y.Z.exe
Where C is the drive letter of the USB device where the executable file is located and Precision_5520_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.
Applies to
Precision 5520 System BIOS