The Acer Aspire 5749 BIOS controls core system settings — boot order, SATA mode (IDE/AHCI), CPU features, integrated devices, and power options. If you’re troubleshooting boot issues, updating hardware, or installing an OS, check these BIOS items first:

: If you only need to change the temporary boot device (e.g., to boot from a USB), tap

within the BIOS to quickly select boot devices like USB drives for modern OS installations. Core Specifications & Hardware

Usually, tapping during POST works. However, if your unit has a supervisor password or a quick-boot flag enabled: