(Cloud Update). This utility is built into the UEFI BIOS of most modern ASUS motherboards, allowing for firmware updates without needing to enter Windows. Method 1: Update via USB (Recommended) This is the most stable and common method. Prepare the USB Drive: Use a USB flash drive (preferably under 32GB) formatted to Download the latest BIOS file for your motherboard model from the ASUS Download Center the downloaded ZIP file and copy the file to the root directory of your USB drive (do not put it in a folder). Enter the BIOS: Restart your PC and repeatedly press the key as it boots until the BIOS screen appears. Run EZ Flash 3: If you are in "EZ Mode," press to switch to Advanced Mode Navigate to the tab and select ASUS EZ Flash 3 Utility Select your USB drive from the storage list, find the file, and click to read it and then again to confirm the update. Do not turn off your computer