Dell Inspiron 17 (5748, Mid 2013) - Manual (Page 91)

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 If you have your computer's Service Tag, type your computer's Service
Tag and click Submit.
If you do not have your computer's Service Tag, click Detect My Product
to allow automatic detection of the Service Tag.
NOTE: If the Service Tag cannot be detected automatically, select
your product under the product categories.
4 Click Get Drivers and Downloads.
5 Click View All Drivers.
6 In the Operating System drop-down, select the operating system
installed on your computer.
7 Click BIOS.
8 Click Download File to download the latest version of the BIOS for your
computer.
9 On the next page, select Single-file download and click Continue.
10 Save the file and once the download is complete, navigate to the folder
where you saved the BIOS update file.
11 Double-click the BIOS update file icon and follow the instructions on the
screen.
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