You install each cartridge the same way that you would install an OEM cartridge. A cartridge is individually wrapped in foil or a plastic bag and often has a tab on top, which you remove when installing the cartridge (just like an OEM cartridge). We recommend using the head cleaning or nozzle cleaning utility that comes with your printer to clean the printer heads before replacing a cartridge. It would help if you did this EVERY time you replace any cartridge, whether OEM or compatible. On most computers, go to Control Panel - Printers - Properties - Utility.