For those who have the same problem stated above... It's the BIOS.
From the original default Windows 8 on Aspire S3, get the latest BIOS which is v2.17 (at the time of my post). Apply the new BIOS. Then access BIOS and turn off UEFI mode. Reboot. Now the BIOS will recognize your bootable USB (Windows, Linux, whatever)
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