Dell Vostro 220 (Late 2008) - Manual (Page 136)

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Safety Instructions
BIOS
The system setup program resides within the BIOS on the system board. If
you install a new system board, you may need to update (or
flash) the BIOS.
Flashing the BIOS From the Hard Drive
1 Turn on the computer.
2 Locate the latest BIOS update file for your computer at support.dell.com.
3 Click Download Now to download the file.
4 If the Export Compliance Disclaimer window appears, click Yes, I Accept
this Agreement.
The File Download window appears.
5 Click Save this program to disk, and then click OK.
The Save In window appears.
6 Click the down arrow to view the Save In menu, select Desktop, and then
click Save.
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.