Support Information:
Device Type: BIOS / Motherboard
Manufacturer: ASUS
Model: P5GLV-MX
Interface: IDE
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID: MB-1234567890

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=122&qa5=1&qa7=1500&dp=3&qm0=P5GLV-MX&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=ASUS+BIOS+%2F+Motherboard++P5GLV-MX+Windows+XP+Professional+MB-1234567890+) | Research manufacturer ASUS (http://members.driverguide.com/index.php?action=getinfo&companyid=122)

The direct download link for the most recent BIOS version is here:

http://dlsvr01.asus.com/pub/ASUS/Barebone/Vintage-PE2/P5GLV-MX-ASUS-Vintage-0308.zip

The .ZIP file ONLY contains the BIOS .ROM code; download the BIOS flash tool directly from here:

http://dlsvr01.asus.com/pub/ASUS/mb/flash/AFUDOS221.zip

You can download a manual for the Asus motherboard in .PDF format from here:

http://www.unitycorp.co.jp/support/download/manual/barebones_manual/e2039_vintage-pe2.pdf

Then, follow the directions in the .PDF manual to create a CLEAN DOS bootup floppy disk, starting on page 63, and you should be able to flash your BIOS without a problem.

Post here again if you have any questions BEFORE you attempt this; the price of failure is a dead motherboard, with little chance of recovery...