• The Officejet’s software for any particular model will be very clearly present in the HP store.

• Go to the HP’s website 123.hp.com/ojp7740 type down the model which you possess.

• If you do not know what they are, then look at the carton that the printer came in. 

• There will definitely be a CD that would have accompanied the printer.

• If you have lost them then do the above step.