If the problem continues after you follow the steps in this article, try the following procedures. These procedures may help you determine the cause of the problem, or they may resolve the problem.
Repair the network connection.
Renew the IP address.
.
Scan for viruses.
2. Error 691
2. "Error 691" Error Message When You Try to Connect to Your ISP
When you attempt to connect to your Internet service provider (ISP), you may receive one of the following error:
Error 691: Access was denied because the user name and/or password was invalid on the domain.
Cause
This behavior can occur if any of the following conditions are true:
The settings for your dial-up connection to your ISP are configured incorrectly.
The dial-up connection's security option is incorrectly configured to use the require secured password setting.
Your ISP's Point-to-Point Protocol (PPP) server is not functioning properly.
You type an incorrect user name or password.
Resolution
To resolve this issue (or issues), use the following methods, as necessary, in the order presented. After you finish each method, check to see whether you can connect to your ISP successfully.
NOTE: You must be logged on as an administrator or a member of the Administrators group to complete these procedures. If your computer is connected to a network, network policy settings may also prevent you from completing these procedures.
Verify Your User Name and Password:
If the problem continues after you follow the steps in this article, try the following procedures. These procedures may help you determine the cause of the problem, or they may resolve the problem.
Make sure that the CAPS LOCK key has not been accidentally pressed and engaged.
Click Start, point to Connect To, and then click your dial-up connection.
In the Connect dialog box, verify that your user name and password are correctly typed in the User name and Password boxes as provided by your ISP, and then click Dial.NOTE: If you are not sure what your user name and password are, contact your ISP for assistance.
3.Error 734
The PPP Link Control Protocol Was Terminated" Error Message Occurs If You Try to Establish a Dial-Up Connection
If you try to establish a Point-to-Point Protocol (PPP) dial-up connection, you may receive the following error message:
Error 734: The PPP link control protocol was terminated.
Cause
Typically, you may receive these error messages when one of the following conditions is true:
Multi-link negotiation is turned on for the single-link connection.
The dial-up connection security configuration is incorrectly configured to use the Require secured password setting.
Resolution
To Troubleshoot this issue, follow these steps
Click Start, point to Settings, and then click Network and Dial-up Connections.
Right-click the appropriate dial-up networking connection and then click Properties.
Click the Networking tab and then click Settings.
Click to clear the Negotiate multi-link for single link connections check box (if it is selected).
Click OK, and then click OK.
Double-click the connection and then click Dial.
Step 1: If this procedure resolves the issue and you can establish a dial-up connection, you do not have to follow the
remaining steps in this article.
Step 2: If this does not resolve the issue and you cannot establish a dial-up connection, go to step 7 to continue to
troubleshoot this issue.
Right-click the connection, and then click Properties.
Click the Security tab.
Under Security options, click Allow unsecured password in the Validate my identity as follows box, and then click OK.
Double-click the connection, and then click Dial to verify that you can establish a dial-up connection.
4. Error 769
Error Message When You Try to Connect to the Internet Through a PPPoE Connection
When you try to connect to the Internet by using a Point-to-Point Protocol over Ethernet (PPPoE) connection, you may
receive one of the following error messages:
Error 769: The specific destination is not reachable.
OR
Error 769: "Either you specified a destination address that is not valid, or your remote server is down."
Cause
This behavior may occur if the network card in your computer is not turned on (enabled).
Resolution
To resolve this issue, turn on (enable) the network card, and then run the Network Setup Wizard. To do this, follow these
steps:
Click Start and then click Control Panel.
In Control Panel, click Performance and Maintenanc and then click System.
In the System Properties dialog box, click the Hardware tab and then click Device Manager.
In Device Manager, click Network adapters.
On the Action menu, click Enable.
Quit Device Manager.
Click Start and then click Control Panel.
In Control Panel, click Network and Internet Connections and then click Network Connections.
In Network Connections, click Network Setup Wizard under Network Tasks and then follow the on-screen steps.
When you complete the steps in the wizard, restart your computer.