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Product Update - 21.5 of Norton Internet Security, Norton AntiVirus and Norton 360

edit August 8 2014: updated announcement to include Comcast Norton Security Suite 21.5 release

Dear Norton Community,

We have completed testing our latest update of Norton AntivirusNorton Internet Security, Norton 360, and Comcast Norton Security Suite, and have released the update. Currently, this patch is available for All LanguagesTo download it, simply run LiveUpdate. A reboot will be required for Windows XP & Vista customers, however no reboot will be required for Windows 7 or Windows 8 customers.

To verify you have the update, launch the Main User Interface, click on Support, and select About.

The FAQ below answers some common questions:

1. What is the version number for this patch?

The version number is

Please note that all Norton Internet Security, Norton AntiVirus, and Norton 360 customers running version 21.x with a valid subscription will receive this update for free. Not using the new Norton products? See if you qualify for a FREE update to the newest version of NIS, NAV, or N360 by visiting the Norton Update CenterThis update is currently available via the Norton Update Center and LiveUpdate.


2. When will I receive the patch?

This patch is available to all customers via LiveUpdate. You can run LiveUpdate manually to receive 21.5, or wait for it to run in the background.

3. How can I manually install these patches?

This patch is only available via LiveUpdate.

4. I see the engine for this version on my system, but my product hasn't updated. What's wrong?


Nothing is wrong; that's how our updates are distributed for the phased approach. The update comes in 2 parts, and most people will get the engine. Both parts together will get your product updated.


5. What are the changes in this release?


Below are the changes and fixes in NIS/NAV/N360/CNSS

- Single Purpose Extension Update for Google Chrome - For more details see announcement