When they tell you that the reset wont change any of your settings, etc. it is not entirely true. It wipes out your favorites and you have to rename the boxes. Minor nuisance, but still , it should be communicated to customers.
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Also resets your Parental password and probably other parental settings (I have none using parental password only to control against accidental purchases).
You do keep your recordings and scheduled series settings.
Some of the support people know and will tell you that settings are lost and other don't.