1–4 External Devices
Using a USB 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.
■ Start or restart 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 System Configuration > Device 
configurations, and then press 
enter.
3. Use the arrow keys to enable or disable USB legacy support.
4. To save your preference 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.