To update the basic input/output system of an Asus computer, download and install Winflash on the computer. Navigate to the Asus website, enter the model number of the computer in the Search text box at the upper-right corner of the page, and click the link to the product on the Search Results page. On the Product page, click Support, click Drivers & Tools, click BIOS-Utilities and download the Windows BIOS Flash Utility. Double-click the downloaded file to install this utility.
On the Driver & Tools page, click BIOS, and click Global to download the latest BIOS for the computer. Once downloaded, run Winflash, and select the downloaded BIOS in the program. If this BIOS is compatible with the computer, click the Flash button to update the BIOS. This process may take a few minutes. When finished, click Exit to shut down the system.
Alternatively, download the latest version of the BIOS, unzip the file, and copy it to a USB flash drive. Restart the computer, and press the F2 key during the booting process to enter the BIOS configuration. Select Advanced in the menu, and select Start Easy Flash. Select the BIOS on the flash drive, press Enter, and click Yes to confirm the update. Once finished, restart the computer.