Sony VGN-TZ340NCP - Manual (Page 194)

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Troubleshooting
Why does the network connection stop when I change the encryption key?
Two computers with the wireless LAN functionality may lose a peer-to-peer network connection if the encryption key is
changed. You can either change the encryption key back to the original profile or re-enter the key on both computers so the
key matches.
How do I display the VAIO Smart Network window?
To display the VAIO Smart Network window on the desktop, follow these steps:
1 Click Start, All Programs, and VAIO Control Center.
2 Double-click Network Connections and VAIO Smart Network.
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For information on the VAIO Smart Network software, see the help file on the software.