Norton AntiVirus indicates out-of-date definitions, but LiveUpdate indicates that no update is necessary

Situation:
Norton AntiVirus indicates that the virus definitions are out-of-date. When you run LiveUpdate, it shows the message "Thank you for using LiveUpdate. All of the Symantec products and components installed on your computer are currently up-to-date. Remember to check for new updates frequently."

Solution:

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Before you begin:
The information in this document pertains to a very specific situation: When you run LiveUpdate, you see the message indicating that you already have the most recent update. Do not follow the steps in this document if you can download virus definitions through LiveUpdate, but the definitions are not updated. In this case, read Virus definitions date does not change after you run LiveUpdate.
This problem can happen if you did not check the virus definitions update box when you ran LiveUpdate. If you did not check the box, and then continued on through the LiveUpdate wizard, you will see the message "Thank you for using LiveUpdate. All of the Symantec products and components installed on your computer are currently up-to-date. Remember to check for new updates frequently." and the virus definitions will not be updated. If the virus definitions update box is checked, then go on with the solutions listed on this page.

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The following solutions have worked for some, but not all, of our customers. Try each solution in the order listed. If the first solution does not fix the problem, go on the next solution until the problem is fixed.


To check the system date
Verify that the computer's system clock is set to the correct day, month, and year. If the clock is set ahead by more than 14 days, then you will see alerts that the virus definitions are out of date but no updates will be available. If the date is correct or this does not fix the problem, go on to the next section.


To run LiveUpdate and download the latest Norton AntiVirus program updates
Run LiveUpdate. Download any available Norton AntiVirus program updates only. Restart the computer if prompted and then run LiveUpdate again to download the latest virus definition updates. If this does not fix the problem, go on to the next section.


To register Navlucbk.dll (versions 2000/2001/2002 only) ***Fixed my problem***
Register the Navlucbk.dll file by following the steps in the next post. This update some entries in the registry used by LiveUpdate to determine which products are installed and which updates it should download, including virus definitions. If this does not fix the problem, go on to the next section.


To go back to the previous virus definitions set
For detailed instructions read How to revert virus definitions to the previous definition set. Once the virus definitions have been changed, run LiveUpdate again and download the latest virus definitions. If this does not fix the problem, go on to the next section.


To check that the virus definition files have not been set to read-only
If the virus definition files are set to read-only, then the definitions cannot be updated.
Open Windows Explorer, and then go to the following folder.

C:\Program Files\Common Files\Symantec Shared\VirusDefs\

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Note: The uses the naming convention of year, month, day. For example, when using virus definition files from April 27, 2004, the folder will be named C:\Program Files\Common Files\VirusDefs\20040427.017
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Click the numbered folder with the most recent date.
Find the files named Virscan1.dat through Virscan9.dat.
Right-click each Virscan*.dat file, and then click Properties.
Uncheck the Read-only attribute if it is checked.
Repeat steps 4 and 5 for all Virscan files.
Run LiveUpdate again. If you are still not able to download the virus definitions, then go on to the next section.


To remove and reinstall all Symantec programs that use the virus definitions
Follow the steps in each section in the order listed to uninstall all Symantec programs that use the virus definitions, delete the virus definitions folder and registry entries, reinstall the Symantec programs, and then run LiveUpdate.

To uninstall the Symantec programs
Use the Add/Remove Programs applet in Control Panel to uninstall all of the Symantec programs that use the \VirusDefs folder. These include the following:
Norton Internet Security
Norton SystemWorks
Norton AntiVirus
Symantec AntiVirus for Handhelds
pcAnywhere
Restart the computer when prompted after each uninstall.

To delete the virus definitions folder
The virus definitions folder may be removed by uninstalling the programs that uses it. However, not all versions of the uninstaller do this. If the virus definitions folder exists after uninstalling all of the Symantec programs that use it, then you must delete the folder manually. The default location is:

C:\Program Files\Common Files\Symantec Shared\VirusDefs

To remove the folder, follow the steps that apply to your version of Windows. Click the icon to the left of the section to either expand ( ) or collapse ( ) that section. (If you cannot open a section, then your Web browser does not let scripts run, or the Windows Script host is not working. Read Cannot expand sections in a Symantec Knowledge Base document for how to fix this. Come back to this page when you are finished.)

Windows 95/98/NT/2000

Windows 95/98/NT/2000
On the Windows desktop, click the Start button > Find or Search > Files or Folders.
Verify that "Look in" is set to (C and that "Include subfolders" is checked.
In the "Named" or "Search for" box, type virusdefs and then press Enter.
The results pane will display the \VirusDefs folder if it exists. It will look similar to the following:





Right-click the \VirusDefs folder, and then click Delete. Click Yes to confirm the deletion.
Windows Me

Windows Me
On the Windows desktop, click the Start button > Search.
Click "For Files or Folders"
In the "Search for files or folders named:" box, type:

virusdefs

Verify that "Look in" is set to "Local Hard Drives" or to (C.
Click Search Now.
The results pane will display the \VirusDefs folder, if it exists. It will look similar to the following:



Right-click the \VirusDefs folder, and then click Delete. Click Yes to confirm the deletion.
Windows XP

Windows XP
On the Windows desktop, click the Start button > Search.
Click For Files or Folders
In the "All or part of the file name" box, type:

virusdefs

Verify that "Look in" is set to "Local Hard Drives" or to (C.
Click "More advanced options."
Check "Search system files and folders."
Check "Search subfolders."
Click Search.
The results pane will display the \VirusDefs folder, if it exists. It will look similar to the following:



Right-click the \VirusDefs folder, and then click Delete. Click Yes to confirm the deletion.


To remove the registry key that refers to the virus definitions folder
Edit the registry to remove the SharedDefs key according to the following instructions:


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WARNING: We strongly recommend that you back up the system registry before making any changes. Incorrect changes to the registry could result in permanent data loss or corrupted files. Modify only the keys that are specified. See the document How to back up the Windows registry before you proceed.
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On the Windows desktop, click the Start button > Run.
When the Run dialog box appears, type regedit and then click OK.
When the Registry Editor opens, navigate to the following key:

HKEY_LOCAL_MACHINE\Software\Symantec\SharedDefs

Click the SharedDefs key and then press Delete.
Click OK.
Exit the Registry Editor.

To reinstall the Symantec programs and run LiveUpdate
Read Reinstalling your Symantec program after a failed installation or after you see error messages for detailed instructions. When finished, run LiveUpdate, and accept all virus definition and program updates. Restart the computer if prompted. Keep running LiveUpdate until there are no more updates available.

If none of the solutions fix the problem, as a workaround, follow the steps in the section "To create a shortcut on the desktop to run LiveUpdate" in Technical Information at the end of this page.



Technical Information:
To create a shortcut on the desktop to run LiveUpdate
Click Start, point to Find, and then click Files or Folders.
Type navlu32.exe and then press Enter.
Right-click the Navlu32.exe file in the results pane at the bottom of the window, and then click Create Shortcut.
Click Yes when you are prompted to place the shortcut on the desktop.

This will create a shortcut on your desktop that will run another version of LiveUpdate. Use this version of LiveUpdate to update your virus definitions and the Norton AntiVirus program only. To run LiveUpdate, simply double-click the icon on your desktop to get the latest updates.

SOURCE: http://service1.symantec.com/SUPPORT/sunse...src=bar_sch_nam