Maintaining an up-to-date BIOS on the Aspire 5749 is critical for hardware compatibility, especially if you plan to upgrade the CPU or RAM. Acer Community Latest available BIOS version - Acer Community
key during startup to access the one-time boot menu (must be enabled in BIOS first). Essay: The Silent Foundation—Understanding Computer BIOS acer aspire 5749 bios link
Finding the correct BIOS for your Acer Aspire 5749 requires using the official Acer Support Page Accessing the BIOS Link Maintaining an up-to-date BIOS on the Aspire 5749