NUA.exe Application Error

I just recently started getting an Application Error from NUA.exe:

The exception unknown software exception (0xc0000409) occurred in the application at location 0x004d22e3.

  

It looks like NUA.exe is temporally downloaded to:

C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate\Downloads\Updt821.

 

I’m using Norton SystemWorks Premier Edition 11.0, Norton AntiVirus 15.0.0.58.

OS XP Pro. SP3. 

 

Any suggestions?