How to Diagnose the Error 678 or Error 769 while trying to connect Internet?

While connecting to Internet Error 678 and Error 796 often appears on the screen.This error are generated when a remote system does not respond correctly upon connecting to the Internet. The Error 678 message appears as “The remote computer did not respond” and Error 769 message appears as “The specified destination is not reachable. ” The Windows OS gives generates the error when you try to browse the Internet. Here is the tutorial to fix the error.

ERROR 678 & 769

Microsoft has listed following probable reasons for the error 678 or 769.

  • Network cable is disconnected.
  • The modem has been disabled.
  • The modem drivers are corrupted.
  • Spyware is running on the computer and is interfering with the connection.
  • Winsock needs to be repaired.
  • Third-party firewall software is blocking the connection.

Diagnose and Resolve the error 678 or error 769

Check the network cable connection

Check the network cable connected to your PC and the modem is working or not. If your computer is connected to a hub or to a router, make sure the cable that connects the hub or the router to the modem is connected.

Check the Network Adapter

Make sure that the network adapter for Internet is enabled. To achieve that click Start > Run > type ncpa.cpl, and then click OK. Right-click the Local Area Connection icon. Click Enable if the option is available.

Reset the modem

The errors can be avoided by resetting the modem. To reset the modem, disconnect the cable that goes from the computer to the modem. Turn off the modem. If the modem does not have a power switch, disconnect the power supply from the modem. Keep the modem disconnected for about two to five minutes, then turn on the modem, and connect the cable that goes from the computer to the modem.

Try Uninstalling and then reinstall of the modem and the drivers by using Device Manager

Firstly, verify that the drivers installed in the computer system are working properly or not. Always keep the updated drivers installed on your system to avoid such errors. Download the latest driver for your network adapter from the hardware manufacturer website.

  • Click Start, click Run, type sysdm.cpl, and then click OK
  • Click the Hardware tab, click Device Manager, and then locate Network Adapters
  • Expand Network Adapters, and then right-click the icon for your network adapter
  • Click Uninstall, and then click OK. In the dialog box that prompts you to remove the files that are associated with this device, click Yes
  • Restart the computer. Or, click Action, and then click Scan for hardware changes.

If Windows finds the device but does not recognize it, then you need to install the latest driver for your network adapter.

If you have network adapter of Realtek 8139, updating the driver seems to resolve this issue. You can update the Realtek driver from

Create a new DSL or cable connection

  • Click Start, click Run, type ncpa.cpl, and then click OK
  • Click Create a new connection under Network Tasks. Click Next when the wizard starts
  • Click Connect to the Internet, and then click Next
  • Click Set up my connection manually, and then click Next
  • Select Connect using a broadband connection that requires a user name and password, and then click Next.

Follow the remaining steps. Use the connection information from your Internet service provider (ISP) to complete the wizard. You may have to use software that is supplied by your ISP to create the new connection.

Repair Winsock and TCP/IP

Click Start, click Run, type netsh winsock reset, and then press ENTER. When the Command Prompt window flashes, restart the computer.

Some Programs that access or monitor the Internet, such as antivirus, firewall, or proxy clients, may be negatively affected when you run the netsh winsock reset command. If you have a program that no longer functions correctly after you use this resolution, reinstall the program to restore functionality.

Uninstall third-party firewalls temporarily

Firstly, verify that the Windows XP firewall is enabled before you remove the third-party firewall program. Some third-party firewall software such as ZoneAlarm and Norton Personal Firewall may cause Internet connectivity issues on computers that are running Windows OS. You may have to temporarily uninstall these programs to test the computer. Disabling these programs may not be sufficient for testing. Make sure that you have the CD or the installation files so that you can reinstall the programs later. If these programs are causing the problem, you may have to contact the program vendor if you need help with the settings for that program.

Scan and Remove Malware, Spyware and Adware

Malware or viruses can prevent you from accessing the Internet. So, Microsoft recommends to have an Anti-virus installed on the computer and keep it updated. Also, install Microsoft Windows Defender to secure the system.

Clear the temporary Internet files

  • Start Microsoft Internet Explorer.
  • Click Tools, and then click Internet Options.
  • On the General tab, click Delete Files.
  • Click OK in the Delete Files dialog box, and then click OK.

If the problem persists after you follow the steps that are described above, then you can try the following procedures. that will help you determine the cause of the problem, or they may resolve the problem.

Try Repairing the Network Connection

  • Click Start, click Run, type ncpa.cpl, and then click OK
  • Right-click the icon for your connection, and then click Repair.

Upon clicking on Repair, Windows renews the IP address of your computer, and it performs other tasks that may help resolve the problem.

Renew the IP address

  • Click Start > Click Run > Type command or cmd, and then click OK
  • Type ipconfig /renew at the command prompt, and then press Enter.

Information related to the new IP address appears in the Command Prompt window. Upon completion close the Command Prompt window.

Try Booting in Safe Mode and verify the Internet connection

  • Turn off the computer. Wait for 10 seconds
  • Turn on the computer, and then immediately press F8 or any other relevant key to enter into the safe mode. The key appears on the booting screen to enter into the safe mode. In the list, select Safe Mode with Networking and press Enter. Click OK in the dialog box that indicates that Windows is operating in Safe Mode.

The above-mentioned steps will hopefully resolve the error 678 and 769 that happen to appear upon connecting to the Internet.


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