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: E6420A21.exe
File size: 5.92 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: d154aef959f7679c0e1869b7a0c82ee6
SHA1: 59075645107de7258332abc31ca2c6acb23718fd
SHA-256: 35ab104c342314c1c6df25c9de67ea69efdd63bc0d57467c887c1aba958b1277
Fixes & Enhancements
Fixes
- Addressed long boot time with encrypted hard drive.
- Addressed OROM keyboard Access can't keep the setting of one time enable.
- Enhanced BIOS protection.
Enhancements
- Updated to the MOB_P_33 version of the Intel microcode patch.
Important Information
Note:
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.
A05 link: http://www.dell.com/support/drivers/us/en/04/DriverDetails?driverId=G10JR
2. Please note that if the A05 or after A05 BIOS and before A08 is currently installed on your system, you must first update to A08 BIOS and then flash to the latest A-rev BIOS.
A08 link: http://www.dell.com/support/drivers/us/en/04/DriverDetails?driverId=CNH63
Supported Operating Systems
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.
--------------------------------------------------------------------------------
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.
Reboot will be required
Applies to
Dell Latitude E6420/E6420