MPLAB C for PIC18 MCUs is a software product for Windows developed by Microchip
It is reported that the following Windows processes are part of MPLAB C for PIC18 MCUs:
If you want to remove MPLAB C for PIC18 MCUs from your computer, just go to Start > Control Panel > Add/Remove programs and select MPLAB C for PIC18 MCUs from the list of programs.