HP 345561-001 Startup And Reference Manual page 111

Hardware Options and Upgrades
The USB connectors on the notebook support USB 2.0- and
1.1-compliant devices.
By default, USB devices function only while the operating
system is loaded. To use a USB keyboard or hub connected to a
USB connector on the notebook during startup (before Windows
loads) or in a non-Windows application or utility, enable USB
legacy support in the Setup utility. For more information about
using the Setup utility, see the "Using the Setup Utility" section
in Chapter 9.
Identifying the 3 USB connectors on the notebook
Startup and Reference Guide—Part 2 8–3