External Devices
Using a USB device
External Devices 1–3
Required USB software
Some USB devices may require additional support software, 
which is usually included with the device. For more information 
about device-specific software, refer to the user guide for the 
device.
USB legacy support
USB legacy support (enabled by default) allows you to
■ Use a USB keyboard, mouse, or hub connected to a USB port 
on the computer during startup or in a non-Microsoft
® 
Windows
® application or utility.
■ Boot from an optional external MultiBay.
To enable or disable USB legacy support:
1. Open Computer Setup by turning on or restarting the 
computer, and then pressing 
f10 while the “F10 = ROM Based 
Setup” message is displayed in the lower-left corner of the 
screen.
2. Use the arrow keys to select Advanced > Device options.
3. Use the arrow keys to enable or disable USB legacy support.
4. To save your preferences and exit Computer Setup, use the 
arrow keys to select File > Save changes and exit. Then 
follow the instructions on the screen.
Your preferences go into effect when the computer restarts.









