Hi Symantec Support, please check below error and advise the possible cause and solution. Thanks
Initializing...
Connecting to LUA...
Connected to LiveUpdate server successfully.
There are 9 update(s) to be downloaded.
Downloading catalog file (1 of 9) finished.
Downloading catalog file (2 of 9) finished.
Downloading catalog file (3 of 9) finished.
Downloading catalog file (4 of 9) finished.
Downloading catalog file (5 of 9) finished.
Downloading catalog file (6 of 9) finished.
Downloading catalog file (7 of 9) finished.
Downloading catalog file (8 of 9) finished.
Downloading catalog file (9 of 9) finished.
Update available for Virus and Spyware Definitions Win32 (hub).
Update available for Virus and Spyware Definitions Win32.
There are 1 update(s) to be downloaded.
Downloading update package (1 of 1) finished.
1 update(s) have been downloaded.
Processing updates...
Encountered an error while decompressing file C:\Documents and Settings\All Users\Application Data\Symantec\Symantec Endpoint Protection\12.1.2015.2015.105\Data\LUE\Downloads\1392679467jtun_sep12ennful26.m26.
Encountered an error while processing an update for Virus and Spyware Definitions Win32 (hub).
Failed to install update for Virus and Spyware Definitions Win32 (hub).
Failed to install update for Virus and Spyware Definitions Win32.
Session summary: 2 update(s) available, 0 update(s) installed.
LiveUpdate session is complete