Sony Notebook User Guide
Using your notebook
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9 Deselect the The key is provided for me automatically option button.
Some information gets visible.
10 Fill in the Network key*.
The network key should be 5 or 13 digits long (or have 10 or 26 hexadecimal characters). You can
choose whatever you want.
11 Select the Computer-to-computer (ad hoc) networks only option button.
12 Click OK.
You r Network name appears in the Preferred networks.