can you share the error code or the screenshot ? if you are not getting one do the below steps and then let us know.
Open control Panel
Open Symantec live update
in General tab, change the mode to "Interactive Mode" and the error suport level to "ENHANCED"
In Update Cache tabe cleate the cache and set the cache level not less than 1 GB
Apply and the Ok
Now from the Run command Window, Type Luall.exe and then run the live update
if it throws any errors post the error message or the screenshot so that we can assist you further.