I had Norton before and all it did was cause me problems.
Welcome to forums...
What did you did?
I had to remove NAV a long time ago...
Well, I survived untill now... I'm avast since then
1) Please, browse the Symantec website and download the specific uninstall tool for NAV. It will clean trash left behing by NAV (files, registry keys). You need this to proper working with avast.
2) On 'Control' in my signature you can download AEC and there is an option for Norton uninstall too.
3) Can you try to repair your installation? Go to Control Panel > Add/Remove programs > avast! antivirus > Remove then choose Repair function in the popup window (Repair).
4) If this does not help, can you uninstall / boot / install / boot again?
5) Can you reinstall Windows over your own installation?
6) You can delete folders/files under either 'Norton' or 'Symantec' folder, the others under Liveupdate folders and ApplicationData...
7) On Registry, well good Registry Cleaners could do some work.
But, for me, the only thing I would worry about is the VDD keys. You must have the following entry there:
C:\Program Files\Alwil Software\Avast4\aswMonVd.dll
Can you post the contents of these Windows Registry keys in your system?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\VirtualDeviceDrivers\\VDD
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\VirtualDeviceDrivers\\VDD
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\VirtualDeviceDrivers\\VDD
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Control\VirtualDeviceDrivers\\VDD
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet004\Control\VirtualDeviceDrivers\\VDD