Norton from Symantec

Error: (8921,240) "Norton LiveUpdate has completed with an unknown error" when I run LiveUpdate in my Norton product


Run LiveUpdate

  1. Start your Norton product.

  2. Depending on your Norton product, do one of the following:

    • For Norton AntiVirus or Norton Internet Security: In the main window, click LiveUpdate.

    • For Norton 360: In the main window, click Tasks, and then click Run LiveUpdate.

  3. When Norton LiveUpdate is finished, click OK or Close.

  4. If the Definitions Updates are not updated, or if you receive any error message, restart your computer and run LiveUpdate once again.

    If the problem persists even after you restart the computer, go to Step 2.


Download and run the Norton Remove and Reinstall tool

    The Norton Remove and Reinstall tool uninstalls all Norton products from your computer, and reinstalls the latest version of your Norton security product. If you have any other utility products like Norton SystemWorks, Norton Ghost, pcAnywhere, or Norton Utilities, you have to reinstall them manually. Before you proceed, make sure that you have the installation files of those products. If you have received your Norton product from your service provider, skip this step and, use the Norton Removal Tool. To download and run the Norton Removal Tool, go to the Norton Removal Tool download page.

  1. Download the Norton Remove and Reinstall tool.

    Save the file to the Windows desktop.

  2. On the Windows desktop, double-click the NRnR icon.

  3. Follow the on-screen instructions.

  4. Restart the computer.

    Your computer may be restarted more than once, and you may be asked to repeat some steps after the computer restarts.

Thank you!

Thank you for using Norton Support.

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DOCID: v71364756_EndUserProfile_en_us
Operating System: Windows 8, Windows 7, Windows Vista, Windows XP
Last modified: 12/03/2014