LiveUpdate fails to Run, Error Code 1803

Article:TECH98312  |  Created: 2009-01-28  |  Updated: 2011-04-04  |  Article URL
Article Type
Technical Solution


LiveUpdate fails with a popup message that displays the following error: "Error: LU1803 Unable to run Liveupdate"


LiveUpdate 3.2

Clicking on Liveupdate will give Error: LU1803

Attempting to open 'Symantec Liveupdate' under the Control Panel displays the following:

LiveUpdate 3.3

Error: LiveUpdate could not access its settings. Error Code: 0x00000000




A clean install of the latest compatible release of LiveUpdate often resolves this issue.  

Uninstall Symantec LiveUpdate with Add/Remove Programs

  1. Change the following registry key:

    HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\Current Version\Explorer\User Shell Folders\AppData

    Change it to:

    HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\Current Version\Explorer\User Shell Folders\AppData



2.  Check for folders left by Liveupdate and remove them if they are present.

Windows XP/2003 

C:\Program Files\Symantec\LiveUpdate, 

C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate.


Windows Vista/7/2008

C:\Program Files\Symantec\LiveUpdate,

C:\Program Data\Symantec\Liveupdate.

  1. Reinstall Symantec LiveUpdate.
  2. Repair install Symantec AntiVirus 10.x or Symantec Endpoint Protection11.x
  3. Run LiveUpdate.


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