…I had uninstalled Norton Systemworks a long time ago! Plus, avast! had worked fine up until the last update. However, now avast has to disable all of it’s non-email services due to some conflict with Norton’s software.
Current avast! version:
Home (Free) edition 4.1.389
If you search the forums for Norton and my name you will find a lot of references to get rid from NAV.
Thank you Technical! Using the Rnav2003 program solved my problem.
Christopher, take a look into three Windows Registry keys (Regedit.exe):
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\VirtualDeviceDrivers
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\VirtualDeviceDrivers
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\VirtualDeviceDrivers
Did you see C:.… path…\Symantec\S32EVNT1.DLL
If you are not sure working with Registry, please, ask for help here.
If you have this driver listed, you’re not free from Symantec 
Chris, please delete the following reg keys:
HEKY_LOCAL_MACHINE\System\CurrentControlSet\Services\NAVAP
HEKY_LOCAL_MACHINE\System\CurrentControlSet\Services\NAVAPEL
(if exist) and reboot the machine. That will solve the problem…
Thanks
vlk