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 1.2.29 System BIOS

Restart required AUTO INSTALLED This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
XPS 15 9550 1.2.29 BIOS
To view all drivers for your XPS 15 9550, go to Drivers and downloads.
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XPS_9550_1.2.29.exe | 9.32 MB
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File Format: CPG BIOS Executable for Windows/DOS
File Name: XPS_9550_1.2.29.exe
File Size: 9.32 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:
cfc82ee807cc6c97739c6035818e861f
SHA1:
c6850d1e6c5b984f647a731a1d01d0785843cf0b
SHA-256:
871c9cc7aa5df3f3cda154407836374b6d46085a721794c27d0e047e6ba71568

Find more updates. Use SupportAssist to find all the latest driver updates for your device.

Fixes & Enhancements

1. Fixed a potential security issue with Bootguard code integrity chaining enforcement".

2. Fixed a potential security issue with the Support Assist PreBoot feature

3. Updated processor microcode

4. Update Computrace 957

5. Support Win10 RS2 Enterprise

6. Enchance NVME support and reduce noise
Read More

Version

1.2.29, 1.2.29

Release date

01 Aug 2017

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.

Additional details

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XPS 15 9550 System BIOS

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

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