Hello,
Upon checking your Logs, we found -
EVENT - PRODUCT UPDATE FAILED EVENT - Update available for Antivirus and antispyware definitions Win64 11.0 MicroDefsB.CurDefs - MicroDefsB.CurDefs - SymAllLanguages. Update for CurDefs takes product from update 0 to 120402002. Server name - liveupdate.symantecliveupdate.com, Update file - 1333384333jtun_emt64nav2k8enccur25.m25, Signer - cn=Symantec Corporation,ou=Locality - Culver City,ou=Product Group - LiveUpdate,ou=SymSignature 2005,o=Symantec Corporation, package install code 0. The Update executed with a result code of 1825, => The install script for this product had a syntax error, so LiveUpdate could not install it.
4/3/2012, 10:10:56 GMT -> Progress Update: PATCH_PROCESSING_FINISH: Number of patches: 2, Num successful: 0
4/3/2012, 10:10:56 GMT -> EVENT - SESSION END FAILED EVENT - The LiveUpdate session ran in Silent Mode. LiveUpdate found 2 updates available, of which 0 were installed and 2 failed to install. The LiveUpdate session exited with a return code of 1806, LiveUpdate downloaded all of the updates you requested, but was unable to install any of them.
Suggestions -
Please work on the Articles provided below:
Error 1825 and 1806 in LiveUpdate logs on Symantec Endpoint Protection client.
http://www.symantec.com/docs/TECH144110
While running LiveUpdate the error: "The update process was unable to complete successfully. Could not find installation path for at least one component."
http://www.symantec.com/docs/TECH105257
Symantec Endpoint Protection Manager (SEPM) reports error "LiveUpdate finish with Return code = 4" and LU error 1875, 1845, 1853, 1806 are present in Log.LiveUpdate.
http://www.symantec.com/docs/TECH91261
How to Uninstall and Reinstall LiveUpdate When a Symantec Endpoint Protection Manager or Symantec Endpoint Protection Client is Installed (SEP 11.x)
http://www.symantec.com/docs/TECH102609
Hope that helps!!