HP Compaq Presario,Presario 2100 User Manual page 23

7 Click Add.
8 Type the network name in the Network name (SSID) box.
9 Select the This is a computer-to-computer (ad hoc) network; wireless access points are not used check
box.
10 Clear the Data encryption (WEP enabled) and the The Key is provided for me automatically check boxes
if they are selected.
11 Click OK.
12 Click Advanced on the Wireless Networks tab.
User Guide
Network Tasks
Page 19