Acer Aspire V5-131 - Manual (Page 54)

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Universal Serial Bus (USB)
The USB 2.0 port is a high-speed serial bus which allows you to connect USB
peripherals without taking up precious system resources.
BIOS utility
The BIOS utility is a hardware configuration program built into your computer's
BIOS.
Your computer is already properly configured and optimized, and you do not need to
run this utility. However, if you encounter configuration problems, you may need to
run it.
To activate the BIOS utility, press <F2> during the POST while the notebook PC logo
is being displayed.
Boot sequence
To set the boot sequence in the BIOS utility, activate the BIOS utility, then select
Boot from the categories listed at the top of the screen.
Password
To set a password on boot, activate the BIOS utility, then select Security from the
categories listed at the top of the screen. Find Password on boot: and use the
<F5> and <F6> keys to enable this feature.