I would like some advice on how to procedure to flash the bios, specially because the information in the thread of the download page is old and it is nor working as it should. Using Windows 10 x64 Pro.
Thank you.
Sorry for posting in the wrong section.

This is direct from the Drivers and Bios section on EVGA's Support site.  The best way to update the bios is via a CD.  I will throw one add on instruction to this.  When you burn the CD, burn it as slow as possible.  This will only change the burn speed by 30 seconds max, but the file is more likely to burn correctly.
 
OS: All Windows Version
Driver Version: 83
Release Date: 9/2/2011
Driver File: Download

The following has been updated in 83:

• Updates CPU Microcode
• Improved CPU Support

INSTRUCTIONS: BIOS updating can be accomplished VIA one of the below methods:
CD Method (Blank CD and CD Rewritable Drive Required)

• Download the following .iso file: E756_83.iso
• Use CD Burning software to burn the .iso image onto a blank CD (Nero, Alochol 120%, MagicISO etc.)
• After it has burned, insert CD and restart the machine, go into the BIOS and load defaults, save and exit.
• Now set the CD Drive as the primary boot device, or press escape while the system is booting to select CD as the bootable device.
• After flash remove the CD, and power off PC Completely.
• Turn on the PC and load defaults in BIOS

Hp USB Disk Tool
http://download.cnet.com/HP-USB-Disk-Storage-Format-Tool/3001-2094_4-10974082.html
 
Win 98 Boot files
http://www.sevenforums.co...e-create-win98boot.zip
 
You really only need DOS access, so why can't you do the old fashion way and make a bootable Win98 disk using the installer and boot files listed above?
Then just add your flash files to it, would that not work?