RegistrySecurity Access is denied. C#

Question

I\'m currently having an issue when writing an app to set permissions on some Legacy keys. Legacy keys are quite locked down and to actually modify them in regedit you have

Answer 1

        RegistryKey rkey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Norton\SecurityStatusSDK", RegistryKeyPermissionCheck.ReadWriteSubTree, RegistryRights.ChangePermissions);
        if (rkey == null)
            throw new Exception("Not Open");
        //-------
        RegistrySecurity _registrySecurity = new RegistrySecurity();//Or rkey.GetAccessControl();
        WindowsIdentity _windowsIdentity = System.Security.Principal.WindowsIdentity.GetCurrent();
        RegistryAccessRule _accessRule = new RegistryAccessRule(_windowsIdentity.Name, RegistryRights.FullControl, InheritanceFlags.ObjectInherit | InheritanceFlags.ContainerInherit, PropagationFlags.None, AccessControlType.Allow);
        _registrySecurity.AddAccessRule(_accessRule);
        _registrySecurity.SetAccessRuleProtection(false, true);
        try
        {
            rkey.SetAccessControl(_registrySecurity);// <---"Attempted to perform an unauthorized operation."
        }
        catch (UnauthorizedAccessException e)
        {

        }

        //--------Now, Set owner

        _registrySecurity.SetGroup(new NTAccount("Administrators"));  //This is optional
        var SID = new System.Security.Principal.NTAccount("XXX\\Users");
        _registrySecurity.SetOwner(SID);
        rkey.SetAccessControl(_registrySecurity);

I installed Norton Internet Security