Dell Inspiron 14 7435 2-in-1 and 16 7635 2-in-1 System BIOS

Restart required

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.

hi testing

Driver Id : 19K0J

Importance : Critical

Version : 1.21.0, 1.21.0 Latest version Recommended version Latest and Recommended version

Release Date : 10 Mar 2026

Download Type : System BIOS

Category : BIOS

This package contains the Dell system BIOS update. BIOS is a firmware package that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives, and other devices. This update addresses the Dell Security Advisories (DSA). A security advisory is a statement when a security vulnerability impacts a product, and a remedy is available for the vulnerability.

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: Inspiron_7435_7635_1.21.0.exe

File size: 27.18 MB

To ensure the integrity of your download, please verify the checksum value.

MD5: c92238f44faa6a576d807249a6d82ecf

SHA1: e37c47eb98a62ccfc88ce2eed45d2eac70e64670

SHA-256: 705f78fc9045d47e161a2261a055239ada279f00dec541a664745d9447c95d71

Download .EXE

File Format: This file format consists of a BIOS Recovery image file. This file is used for the System BIOS Recovery process to recover a system from a corrupted BIOS.

File Name: BIOS_IMG.rcv

File size: 17.24 MB

To ensure the integrity of your download, please verify the checksum value.

MD5: 6375454e461994235f988dcc311ae358

SHA1: dc17349b5b96a66e20a3bf7bddf7f3b277e0a968

SHA-256: 740a331226aa41de1c82f46b6824ba9e61be69d6692ee28c254f017424aa7d79

Download .RCV

Fixes & Enhancements

- This release contains security updates as disclosed in the Dell Security Advisories DSA-2026-022, DSA-2026-069, DSA-2026-073, and DSA-2026-044. The DSA details are published on the Security Advisories, Notices, and Resources page, once they are publicly available. For more information about the release schedule, see Dell Client Drivers and Downloads Update Release Schedule.
- Fixed the issue where the Secure Boot cannot change from Audit Mode to Deployed Mode.

Compatible Systems

Inspiron 14 7435 2-in-1

Inspiron 16 7635 2-in-1

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 BitLocker 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.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.

Download and Installation
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the file.
5. Click Yes to open the BIOS update utility.
6. Click Update to initiate the update process. A progress bar is displayed.
7. Click Restart to restart the system once the progress bar reaches 100%.
The update process initiates at the Dell logo and an update initiation message is displayed with a progress bar. After the update finishes, the system automatically restarts.

Updating the BIOS from BIOS Boot Menu (independent of operating system)

Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker 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.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.

Installation
1. Copy the downloaded file to a USB drive. You do not need a bootable USB drive.
2. Insert the USB drive into any USB port.
3. Power on the system.
4. At the DELL logo screen, press F12 to access the one-time boot menu.
5. Select BIOS Flash Update in the Other Options section.
6. Click the ... button to browse the USB drive to locate the downloaded file.
7. Select the file and click OK.
8. Verify the existing system BIOS information and the BIOS update information.
9. Click Begin Flash Update.
10. Review the Warning message and click Yes to proceed with the update.
The system restarts and displays a Flash Progress bar at the Dell logo screen. The system restarts again when the Flash update is complete.

Dell Inspiron 14 7435 2-in-1 and 16 7635 2-in-1 System BIOS

Download Files

Fixes & Enhancements

Important Information

Compatible Systems

Supported Operating Systems

Installation instructions

Applies to