Hi,
I think your installation is seriously damaged, maybe you did something wrong to resolve one of the issues you met in this week:
I guess the keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmvirdef32
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs\SymcData-sesmvirdef64
are not pointing to:
%programfiles%\common files\Symantec Shared\SymcData\sesmvirdef32
%programfiles%\common files\Symantec Shared\SymcData\sesmvirdef64
Try to fix them by typing the full path.
Call the support if you still need help.
Regards,