You might encounter symptoms when wired and wireless connection gives out an error 623 after you pulled up IE, irregardless if its IE6 or IE7. Another hint is you’re connected to WLAN but cannot browse.
You may receive this error message if the VPN connection is configured to use a dial-up connection that has been deleted.
To work around this issue:
1. Click Start, click Control Panel, and then click Network and Internet Connections.
2. Click Network Connections.
3. Right-click the VPN connection, and then click Properties.
4. Click to select the Dial another connection first check box, and then click the appropriate dial-up connection. If there are no dial-up connections to select, you may have to create a dial-up connection and repeat these steps.
If your VPN connection does not require a dial-up connection, click to clear the Dial another connection first check box, and then click OK.