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 XPS 15 9550 System BIOS

Restart required Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
This package contains the Dell system BIOS update for Dell XPS 9550. BIOS is a firmware that is embedded on a small memory chip on the computer's system board. It controls the keyboard, monitor, disk drives and other devices. This update addresses the Intel security advisory INTEL-SA-00185.
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Fixes & Enhancements

Fixes:
- Firmware updates to address security advisory INTEL-SA-00185 (CVE-2018-12188 CVE-2018-12190 CVE-2018-12191 CVE-2018-12192 CVE-2018-12199 CVE-2018-12198 CVE-2018-12200 CVE-2018-12187 CVE-2018-12196 CVE-2018-12185).
- Fixed an issue with Secure Boot Option ROM Signature Verification
- Fixed the issue where the BIOS option SupportAssist OS Recovery stays in the Enabled state after the system fails to boot.

Enhancements:
- None.
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Version

1.10.0, 1.10.0

Release date

21 Mar 2019

Download Type

System BIOS

Category

BIOS

Importance

Critical
Dell Technologies highly recommends applying this important update as soon as possible. The update contains critical bug fixes and changes to improve functionality, reliability, and stability of your Dell system. It may also include security fixes and other feature enhancements.
Available formats
File Format: Flash BIOS executable
File Name: XPS_9550_1.10.0.exe
File Size: 9.73 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format consists of a BIOS-executable file. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.
MD5:
f229d3db958726754d96925b21650236
SHA1:
63bc71bd3c6e0a8b56f1ab937c32c2733b724041
SHA-256:
23d1e94742a6d32ce50befe3a6b26ce1de54a72f9a79f9431cdd6201653612e7

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

Additional details

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XPS 15 9550 System BIOS
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.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.

Run the BIOS update utility from Windows environment.

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 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.

Run the BIOS update utility from DOS environment (Non-Windows users)

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:\ XPS_9550_X.Y.Z.exe
Where C is the drive letter of the USB device where the executable file is located and XPS_9550_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.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting guide

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