Your HJT log is clean, although you do still have the Symantec live update running and it shouldn`t be.
Click start/run and type services.msc into the run box and press the enter key.
When the window appears, maximise it. Double click on the following services(if there) and select stop if they are running. Set the startup type to disabled. Click apply/ok for each service you disable.
Automatic LiveUpdate Scheduler
Close the services window.
Go to add remove programmes in your control panel and uninstall anything to do with(if there).
Symantec\LiveUpdate
Close control panel.
Locate and delete the following
bold files and/or directories(if there).
C:\Program Files\
Symantec
Maybe you`d like to take a look at this thread
HERE. It`ll help you to speed up your pc.
Regards Howard