Hi, Roger

Generally, you don't care about some fuses cause general use of Pic do not involve their use.

Each have a DEFAULT setting ( ON or OFF ... type of osc ....)

Here Pickit just warns you, coz' you didn't care with some ... that's all.

MPLAB show you the full window ... just look at those you didnt set or clear.

OR Open the MPLAB 16F88.inc file ( Not the PbP one !!! ) ... you'll find everything there !!!

Alain