Thanks for the info, I read the other thread, unistalled norton again after putting it back on and cleaned up the regestry, rebooted and thenre installed Avast and all is now working as it should be.

If you install Norton, try to see if you have corrected the registry keys for DOS in the following keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\VirtualDeviceDrivers
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\VirtualDeviceDrivers
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\VirtualDeviceDrivers
Do you see any Symantec driver listed here?
Is the avast! driver listed? If not, you are not protected :'(
If you don´t believe me, try eicar test from DOS (cmd window).
