If you are using Norton Internet Security 2006, your auto updater subscription is probably expired. So you need to manually download the Virus Definition Archive from here, and run installer. When you run installer, you might get this error message …
Symantec Intelligent Updater
Intelligent Updater session complete.
All updates failed to install on the machine. For more details about the processing, please check the log file “Log.IntelligentUpdater.txt”
created in the user’s temporary directory.
When you Investigate that file …
Sun Jan 22 19:31:40 2012 : PROCESSING ENTRY: VIRSCAN.zip – Virus Definitions
Sun Jan 22 19:31:40 2012 : Entry details:
path for the Authorization DLL from the registry.
Sun Jan 22 19:31:40 2012 : IU failed while deploying V because a compatible product could not be found on the system. Please make sure that a compatible Symantec product is installed on the system.
UNZIP the virus definition package, there will be a folder “VirusDef”, copy it to C:\VirusDef
You need to copy this folder inside C:\Program Files\Common Files\Symantec Shared\VirusDefs\Incoming\
But this folder is readonly and probably locked by service, So restart your machine, Run in Safe mode with Command Prompt Only.
Now in Command Prompt,
copy *.* C:\Program Files\Common Files\Symantec Shared\VirusDefs\Incoming\
Now restart you machine, Norton will detect the new files automatically and update the definitions date.
XVI. Installing Virus Definition Files Manually
If you do not want Intelligent Updater to install the new virus
definitions for you automatically, you can use the /DUMP command to
extract the virus definition files, then copy the appropriate files
to the virus definitions folder.
Installing Virus Definition Files Manually
1. Copy the Intelligent Updater program (yyyymmdd-vvv-I32.EXE or
yyyymmdd-vvv-X86.EXE) to an empty, temporary folder.
2. Launch the Intelligent Updater program using the /DUMP command.
For the yyyymmdd-vvv-X86.EXE file, use the /EXTRACT command.
This will extract all the virus definitions to the folder. For
example, type yyyymmdd-vvv-I32.EXE /DUMP to extract the files. Or
type yyyymmdd-vvv-X86.EXE /EXTRACT [path] where path represents
the current directory. The yyyymmdd represents the date of the
definition set. The vvv represents the version number. For example,
the filename could be 20021231-001-I32.EXE for a December 31
3. Copy the files to the virus definition folder. Copy the files to
C:\Program Files\Common Files\Symantec Shared\VirusDefs\Incoming\
NOTE: Copy the file ZDONE.DAT last. This file signals Norton
AntiVirus that the definition set has been completely loaded. If
it is not loaded last, it may cause errors.