Hi,
Check this artical
LiveUpdate fails with a popup message that displays the following error: "Error: LU1803 Unable to run Liveupdate"
http://www.symantec.com/business/support/index?page=content&id=TECH98312
A clean install of the latest compatible release of LiveUpdate often resolves this issue.
Uninstall Symantec LiveUpdate with Add/Remove Programs
- Change the following registry key:
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\Current Version\Explorer\User Shell Folders\AppData
value=%APPDATA%
Change it to:
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\Current Version\Explorer\User Shell Folders\AppData
value=%USERPROFILE%\AppData\Roaming
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.
- Reinstall Symantec LiveUpdate.
- Repair install Symantec AntiVirus 10.x or Symantec Endpoint Protection11.x
- Run LiveUpdate.