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