I for one am convinced that a good percentage of update download failures and problems are a direct result of using the Automatic download and install option. This option increases the susceptibility to corruption and the detrimental interruption of data, due to situations present or occurring during the unattended downloads and subsequent installations. I personally choose the option to check for downloads but insist on when to download and install them. Your machine should ideally be in a neutral state of activity, free of any interfering processes that might otherwise compromise the event. Do you think I am being to cautious or paranoiac.