Error: "8505,129"

To fix this problem, restart your computer. If you continue to receive this error, you need to check your Network proxy settings and run an advanced scan for potentially unwanted applications with Norton Power Eraser.


Check the Network proxy settings

  1. Press the Windows + R keys to open the Run dialog box.

  2. Type in the following text, and then press Enter.


    Internet Properties window is launched on your computer.

  3. On the Connections tab, click LAN settings.

  4. In the Local Area Network (LAN) settings dialog box, under Proxy server, ensure that none of the check boxes are selected.

  5. If you find any entries under Proxy server, uncheck the boxes and select Automatically detect settings.

    Unknown proxy server address can be an indication of potential threat or unwanted application. You must run an Advanced scan on your computer with Norton Power Eraser.

  6. Click OK.

  7. Click Apply and then click OK.

    If the problem persists, go to step 2.


Configure network connection settings on Windows

  1. Press the Windows + R keys to open the Run dialog box.

  2. In the Run dialog box, type the following and then click OK:


  3. Right-click the network adapter that is currently active, and then click Properties.

    If the User Account Control prompt appears, click Yes or Continue.

  4. In the Network Connection Properties window, under "This connection uses the following items", click Internet Protocol (TCP/IP) or Internet Protocol Version 4 (TCP/IPv4).

  5. Click Properties.

  6. To specify DNS server address settings, click Use the following DNS server addresses.

  7. In the Preferred DNS server and Alternate DNS server boxes, type the two Norton ConnectSafe IP addresses.

    Preferred DNS:

    Alternate DNS:

  8. In the Internet Protocol (TCP/IP) Properties window, click OK.

  9. Click OK.

    If the problem persists, run a scan with Norton Power Eraser in step 3.


Run the Norton Power Eraser - Unwanted Application Scan

  1. Download Norton Power Eraser.

  2. Click Save.

  3. Select the location as Desktop, and then click Save.

  4. To run Norton Power Eraser, double click the NPE.exe file.

    If the User Account Control window prompts, click Yes or Continue.

  5. Read the license agreement, and click Accept.

  6. In the Norton Power Eraser window, click the Unwanted Application Scan icon.

    When Norton Power Eraser completes the scan, the results are displayed in the Unwanted Apps Scan Complete window.

  7. In the Unwanted Apps Scan Complete window, next to the unwanted application or toolbar, click Uninstall.

  8. Follow the on-screen instructions.

  9. When the uninstall completes, restart the computer.

    If the issue still persists, look for the unwanted toolbars that are usually bundled with certain free programs you might have installed on your computer. To know more about removing these types of browser hijackers, read Removing unwanted toolbars from your computer.

What if this didn't work?

Thank you!

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DOCID: v71552856_EndUserProfile_en_us
Operating System: Windows
Last modified: 05/29/2017