HP Compaq Presario,Presario 1110 Reference Manual page 65

If you're within range of your wireless network, your computer automatically connects.
To check the status of your wireless connection, open Network Connections in Control
Panel and double-click the connection.
Turning off communication and ending a connection
1. Important: close any files that reside on other network computers.
2. To turn off the wireless 802.11 communication without turning off the computer,
press the wireless on-off button—this also turns off Bluetooth communication if it
was enabled.
–or–
Click Start, All Programs, Utilities, Wireless Configuration, then click the 802.11
button to turn off wireless 802.11 communication—without affecting Bluetooth
communication.
–or–
Right-click the wireless network connection icon in the taskbar and select Disable.
Suspending or shutting down the computer also turns off the wireless function.
Modem and Network Connections
Making Wireless Network Connections
Reference Guide 65