Dell I14Z-2877BK Owner's Manual page 74

6 Click Save to save the file on your desktop. The file downloads to your
desktop.
7 Click Close if the Download Complete window appears. 
The file icon appears on your desktop and is titled the same as the
downloaded BIOS update file.
8 Double-click the file icon on the desktop and follow the instructions on
the screen.
74
Flashing the BIOS