While some are willing to gamble with @BIOS, it has been known to brick motherboards. You didn't mention what motherboard you have, but if it has the Qflash option this is the much safer route to take to update BIOS.
The process for updating BIOS using QFlash - from within BIOS itself - is easy enough that there is no reason not to do it that way. Basically, you:
1. Download the latest BIOS file
2. 'Run' the file (double-click it, whatever your prefered metaphor is) to unpack the contents onto a USB drive.
3. Reboot your machine with the USB drive plugged into a USB slot
4. Enter BIOS
5. Enter Qflash - I believe using F8 but it will say at the bottom of your screen (it is possible to enter Qflash during POST without entering BIOS, either method is ok)
6. Find your USB drive - it may be labeled HDD
7. Select your BIOS file from the USB and let it run
8. When you get back into BIOS, select Load Optimized Defaults, then make any changes you have made previously
You can find additional information here: http://www.gigabyte.com.tw/FileLis