Please let me know if this resolves the issue. However, you can generate UEFI-compatible media with some utilities, such as Macrium Reflect Free,, and Kaspersky Lab advertises the 'World’s First Anti-Malware Product for UEFI'. If you wish to use the legacy boot media you have, see Acer's directions for that at. (Put the target USB option first in the list. Adjust the boot priority order by using the up and down arrows. Press the right arrow on the keyboard to select the Boot menu tab. Press the Acer BIOS key, F2 or Del, to access the BIOS setup window. It is so secure that it prevents booting from media with an incorrect 'signature', but can be adjusted to turn off security features so that you can boot from legacy media. Steps to change boot order Windows 10: Shut down your Acer computer. UEFI is a more secure replacement for BIOS see.
