Restart and tap Delete or F2 during boot. The model name and current BIOS version are usually displayed on the main "EZ Mode" screen.

Check the original box or a small sticker on the motherboard itself (often near the RAM slots). 2. Download the Firmware File

Always use official ASUS sources to avoid corrupted files or malware. Download Center | Official Support | ASUS Global

Before downloading, you must know your exact motherboard or laptop model.