Norton from Symantec

Error: "8506,421" appears on my Norton product

In many cases, this error can be fixed by restarting the computer. If the problem persists even after you restart the computer, you need to uninstall and reinstall your Norton product. Download and run the Norton Removal Tool to uninstall your product.

STEP 1

Download and run the Norton Removal Tool

  1. Download the Norton Removal Tool.

    Save the file to the Windows desktop.

  2. On the Windows desktop, double-click the Norton Removal Tool icon.

  3. Follow the on-screen instructions.

  4. Restart your computer.

    After the computer restarts, follow the on-screen instructions to reinstall your Norton product.

    If the problem persists, go to Step 2.

STEP 2

Download and run Norton Power Eraser

  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 appears, click Yes or Continue.

  5. Read the license agreement, and click Accept.

  6. In the Norton Power Eraser window, click the Scan for Risks icon.

  7. By default, Norton Power Eraser performs a Rootkit scan and requires a system restart. When you see a prompt to restart the computer, click Restart. If you do not want to include the Rootkit scan, go to Settings, and uncheck the option Include Rootkit scan (requires a computer restart).

  8. After the computer is restarted, the scan starts automatically. Follow the on-screen instructions.

Thank you!

Thank you for using Norton Support.

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DOCID: v80281719_EndUserProfile_en_us
Operating System: Windows
Last modified: 05/26/2015