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

Dell XPS 15 9550 1.4.0 System BIOS

XPS 15 9550 1.4.0 BIOS

Fixes & Enhancements

1. Fixes system defense with wireless parameter will cause ME failure
2. System stability enhancements
3. To prevent user update ME Firmware to blacklist 11.6 ME firmware
4. Correct error message in Excalibur
5. Fix Bitlocker issue on Win7 ultimate/enterprise

Version

Version 1.4.0, 1.4.0

Category

BIOS

Release date

15 Sep 2017

Last Updated

15 Sep 2017

Importance

Available formats

File Format:Windows/DOS
File Name:XPS_9550_1.4.0.exe
Download Type:HTTP
File Size: 9 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:
b39cf13aebb3efca50e6269d05c13350
SHA1:
5498cda7e2dfdcbebba8a24baf686cb793307aac
SHA-256:
8c14b35615325580b3c209386080bb4c7a6eaf9b44bbf1ff8960b038459d276b

By downloading, you accept the terms of the Dell Software License Agreement.

Applies to
XPS 15 9550 System BIOS
Installation instructions
Download file to Desktop
The file XPS_9550_X.Y.Z.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.
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Run the BIOS update utility from Windows environment
1. Double click the Icon on your desktop labeled XPS_9550_X.Y.Z.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 XPS_9550_X.Y.Z.exe to a bootable USB key.
2. Boot from the USB key to the DOS prompt.
3. Run the file by typing A:\ XPS_9550_X.Y.Z.exe (where A is the drive letter where the executable is located).
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Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

Dell highly recommends applying this update as soon as possible. The update contains changes to improve the reliability and availability of your Dell system.