Dell Alienware 17 R2 (Early 2015) - Manual (Page 143)

Flashing the BIOS
You may need to flash (update) the BIOS when an update is available or when
you replace the system board. To flash the BIOS:
1 Turn on the computer.
2 Go to dell.com/support.
3 Click Product Support, enter the Service Tag of your laptop and click
Submit.
NOTE: If you do not have the Service Tag, use the auto-detect feature
or manually browse for your computer model.
4 Click Drivers & downloads.
5 Scroll down to Or, show me all available drivers for … and select
BIOS from the Category drop-down list.
NOTE: In the Change OS drop-down list, select the operating
system installed on your computer.
6 Expand BIOS to view the available BIOS files.
7 Click Download File to download the latest version of the BIOS for your
computer.
8 Save the file and once the download is complete, navigate to the folder
where you saved the BIOS update file.
9 Double-click the BIOS update file icon and follow the instructions on the
screen.
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