Please do the following:
1. On the SPC server, Go to C:/Documents and settings/All users/Application Data/Symantec/Liveupdate, and delete the folder.
2. Go to C:/Program files/Symantec/Symantec Protection Center/Inetpub/Content and delete the contents of all the folders . Caution" Do not delete the folders inside the Content folder, but delete their contents.
3. Go to Add/Remove programs, uninstall liveupdate
4. Re-install liveupdate, by running lusetup.exe. You can download lusetup from ftp://ftp.symantec.com/public/english_us_canada/liveupdate/3.3.0/
Once it is installed, go to the command prompt, and type:
cd..
cd..
cd program files
cd symantec
cd Symantec Symantec protection center
cd Bin
lucatalog -cleanup
once done, then type:
lucatalog -update
Once this is completed, run liveupdate on SPC