ken545
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
This line in your HJT log is showing that the background guard is still active and is most likely blocking HJT from removing those entries,
You can try right clicking on both AVG and Norton Security in your system tray and shutting down or disabling both programs , then fix those two entries with HJT . When you reboot both programs will become active again.
If they won't go away, don't lose any sleep over it, its nothing bad.
Ken